ClinicalTrials.gg
CompletedNCT04206605Updated Dec 27, 2023Results posted

A Study of Lanadelumab in Teenagers and Adults to Prevent Acute Attacks of Non-histaminergic Angioedema With Normal C1-Inhibitor (C1-INH)

A Phase 3 interventional study of Placebo and Lanadelumab in Angioedema, sponsored by Takeda. Completed at 45 sites in 10 countries. Open to participants aged 12 Years and older. Per ClinicalTrials.gov, last updated 2023-12-27.

Sponsored by Takeda · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
77
Allocation
Randomized
Ages
12 Years and older
Sex
All
01

Study summary

The main aim of this study is to check if repeated subcutaneous (SC) injections of lanadelumab can prevent angioedema attacks in teenagers and adults with non-histaminergic angioedema with normal C1-INH. Another aim is to check if they tolerate the repeated SC injections.

Participants will receive a SC injection of lanadelumab every two weeks for 26 weeks. The first two doses of lanadelumab will be given at the study clinic. Once a participant (and/or parent/caregiver) has been appropriately trained, lanadelumab can be self-injected. Visits to the study clinic are planned for the first, third and fourth week and then every 4 weeks.

Read the detailed description

This study consists of non-histaminergic normal C1-INH angioedema population with 12 years of age and above. Participants will be randomized 2:1 to receive repeated SC administrations of lanadelumab or placebo in a double-blind fashion. Randomization will be stratified based on baseline angioedema attack rate (1 to less than (\<) 2 attacks/4 weeks, and greater than (>=) 2 attacks/4 weeks), as well as subtype (known mutations, family history and unknown mutation, idiopathic).

02

Conditions studied

  • Angioedema

Browse trials for

Keywords

  • Drug Therapy
03

In context

Angioedema

69 studies on the registry are indexed under Angioedema; 16 are open to participants now.

This study's enrollment of 77 is above the median of 45 across 44 interventional studies indexed under Angioedema.

Browse Angioedema studies →

Lead sponsor

Takeda is the lead sponsor of 1,026 studies on the registry; 89 are open to participants now.

Of its 178 completed or terminated interventional studies of FDA-regulated products, 154 (87%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
12 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

The Participant will not be considered eligible for the study without meeting all of the applicable population criteria below.

  • Males and females, 12 years of age and older for participants with non-histaminergic normal C1-INH angioedema at the time of signing of the form (ICF).
  • Documented clinical history of recurrent attacks of angioedema in the absence of wheals/urticaria.
  • Investigator-confirmed diagnosis of non-histaminergic bradykinin-mediated angioedema with normal C1-INH as documented by a history of angioedema attack(s) at screening and occurrence of attacks during the observation period:

    • History of recurrent angioedema with at least an average of 1 angioedema attack per 4 weeks prior to screening and this attack rate must be confirmed during the observation period while treated with chronic high-dose antihistamine (cetirizine 40 milligram per day [mg/day] or equivalent high-dose second-generation antihistamine medication).
    • Diagnostic testing results obtained during screening from a sponsor-approved central laboratory that confirm C1-INH function >= 50 percent (%) of normal and C4 level not below the normal range. With prior sponsor approval, participants may be retested during the observation period if results are incongruent with clinical history.
    • Clinical history of not responding to high-dose antihistamine treatment (cetirizine 40 mg/day or equivalent high-dose second-generation antihistamine medication), which must be confirmed during the observation period with at least 1 angioedema attack per 4 weeks with chronic high-dose antihistamine treatment and no significant difference (as assessed by the investigator and in consultation with the sponsor's medical monitor, as necessary) from the historic attack rate without high-dose antihistamine treatment.
  • Agree to adhere to the protocol-defined schedule of treatments, assessments, and procedures.
  • Participants >= 18 years of age must be willing to use icatibant as the rescue medication during the observation and treatment period. During the observation period, participants need to be treated with icatibant for at least 2 angioedema attacks or at least 1 moderate or severe attack. In the opinion of the investigator, participants with no response to icatibant for acute angioedema attacks in the past medical history/screening, or no improvement or worsened attack severity 2 hours after icatibant treatment during the observation period (based on totality of assessments), will not be included. Note: For participants 12 to \< 18 years of age, standard of care therapy per local protocols should be provided.
  • Males, or non-pregnant, non-lactating females who are of and who agree to be abstinent or agree to comply with the applicable requirements of this protocol for the duration of the study. Female participants of childbearing potential must have a negative serum pregnancy test at screening and must be willing to undergo pregnancy tests throughout the study. Females of non-childbearing potential are defined as surgically sterile (status post hysterectomy, bilateral oophorectomy, or bilateral tubal ligation) or for at least 12 months.
  • The participants (or the participant's parent/legal guardian, if applicable) has provided written informed consent approved by the institutional review board/research ethics board/ethics committee (IRB/REB/EC).
  • If the participants is an adult, be informed of the nature of the study and provide written informed consent before any study-specific procedures are performed.

OR

  • If the participants is a minor (i.e. \< 18 years of age), have a parent/legal guardian who is informed of the nature of the study provide written informed consent (i.e. permission) for the minor to participate in the study before any study-specific procedures are performed. Assent will be obtained from minor participants.

Exclusion criteria

Exclusion Criteria

The participant will be excluded from the study if any of the following exclusion criteria are met.

  • Concomitant diagnosis of Type I or Type II HAE, or recurrent angioedema associated with urticaria.
  • Dosing with any drug or exposure to an investigational device within 4 weeks prior to screening.
  • Exposure to angiotensin-converting enzyme (ACE) inhibitors or rituximab within 6 months prior to screening.
  • Use of any estrogen-containing medications with systemic absorption (such as oral or hormonal replacement therapy) within 4 weeks prior to screening.
  • Response to omalizumab (prophylactic) or (acute/prophylactic) or epinephrine (acute) or anti-leukotrienes (prophylactic) treatments in the past.
  • Use of long-term prophylactic therapy for HAE, e.g. C1-INH, attenuated androgens (e.g. danazol, methyltestosterone, testosterone), or anti-fibrinolytics within 2 weeks prior to entering the observation period as long as the investigator determines that doing so would not place the participant at any undue safety risk, and that the participant is at least 18 years of age.
  • Any exposure to prophylactic plasma kallikrein inhibitors prior to screening.
  • Use of short-term prophylaxis for HAE within 7 days prior to entering the observation period. Short-term prophylaxis is defined as C1-INH, attenuated androgens, or anti-fibrinolytics used to avoid angioedema complications from medically indicated procedures.
  • Have any active infectious illness or fever defined as an oral temperature greater than (>) 38°C (100.4°F), tympanic > 38.5°C (101.3°F), axillary > 38°C (100.4°F), or rectal/core > 38.5°C (101.3°F) within 24 hours prior to the first dose of study drug in the treatment period.
  • Any of the following liver function test abnormalities: (ALT) > 3x , or aspartate aminotransferase (AST) > 3x upper limit of normal, or total > 2x upper limit of normal (unless the bilirubin elevation is a result of Gilbert's syndrome).
  • Pregnancy or breast feeding.
  • Participant has a known to the investigational product or its components.
  • Have any uncontrolled underlying medical condition which would require treatment adjustment during the study treatment period that, in the opinion of the investigator or sponsor, may confound the results of the safety assessments or may place the participant at risk. Participants with stable treatment for at least 3 months prior to screening and NOT expecting any change to their treatment regimen for 6 months during the study treatment period, will not be excluded.
  • Have any condition (surgical or medical) that, in the opinion of the investigator or sponsor, may compromise their safety or compliance, preclude the successful conduct of the study, or interfere with interpretation of the results (e.g. significant pre-existing illness or other major comorbidities that the investigator considers may confound the interpretation of study results).
Terms in these criteria, in plain language(10)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Postmenopausal

Periods have stopped for good: usually no period for 12 months in a row without another medical reason, sometimes confirmed by a blood test (FSH).

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

ALT and AST (liver enzymes)

Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.

Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

Bilirubin

A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.

Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
77 participants (actual)

Study arms

  • Placebo comparator
    Placebo

    Participants received placebo-matching lanadelumab subcutaneous (SC) injection once every 2 weeks (q2w) for up to 7 months.

    Other: Placebo

  • Experimental
    Lanadelumab 300mg

    Participants received 300 mg of lanadelumab solution in a prefilled syringe (PFS) as SC injection once (q2w) for up to 6 months.

    Drug: Lanadelumab

Interventions

  • OtherPlacebo

    Placebo-matching lanadelumab SC injection.

  • Lanadelumab solution in a PFS for injection.

    Also known as: SHP643, DX-2930, TAK-743

06

What researchers measure

Primary outcomes

  1. Number of Investigator-Confirmed Angioedema Attacks During the Treatment Period of Day 0 Through Day 182

    An angioedema attack was defined as the symptoms or signs consistent with an attack in at least 1 of the following locations: peripheral angioedema (cutaneous swelling involving an extremity, the face, neck, torso, and/or genitourinary region), abdominal angioedema (abdominal pain, with or without abdominal distention, nausea, vomiting, or diarrhea), laryngeal angioedema (stridor, dyspnea, difficulty speaking, difficulty swallowing, throat tightening, or swelling of the tongue, palate, uvula, or larynx). Attack rate was calculated for each participant as the number of attacks occurring during the specified period divided by the number of days the participant contributed to the specified period multiplied by 28 days. Number of investigator-confirmed angioedema attacks during the treatment period of Day 0 through Day 182 was assessed.

    Time frame: Day 0 through Day 182

Secondary outcomes

  1. Number of Participants Achieving Attack-Free Status During the Treatment Period of Day 0 Through Day 182

    An angioedema attack was defined as the symptoms or signs consistent with an attack in at least 1 of the following locations: peripheral angioedema (cutaneous swelling involving an extremity, the face, neck, torso, and/or genitourinary region), abdominal angioedema (abdominal pain, with or without abdominal distention, nausea, vomiting, or diarrhea), laryngeal angioedema (stridor, dyspnea, difficulty speaking, difficulty swallowing, throat tightening, or swelling of the tongue, palate, uvula, or larynx). A participant was considered as attack free during a time period if the participant has no investigator-confirmed angioedema attacks during that time period. For participants who discontinue the study prior to completion of the analysis period, participants were classified as attack-free or not based on the observed contribution to the analysis period. Number of participants achieving attack-free status during the treatment period of day 0 through day 182 was assessed.

    Time frame: Day 0 through Day 182

  2. Number of Investigator-Confirmed Moderate or Severe Angioedema Attacks During the Treatment Period of Day 0 Through Day 182

    Angioedema attack was defined as symptoms or signs consistent with an attack in at least 1 of the following locations: peripheral angioedema (cutaneous swelling involving an extremity, face, neck, torso, and/or genitourinary region), abdominal angioedema (abdominal pain, with or without abdominal distention, nausea, vomiting, or diarrhea), laryngeal angioedema (stridor, dyspnea, difficulty speaking, difficulty swallowing, throat tightening, or swelling of tongue, palate, uvula, or larynx). Overall severity of the participant's angioedema attack was determined by site using the following definitions: 1. Mild: Transient or mild discomfort; 2. Moderate: Mild to moderate limitation in activity some assistance needed; 3. Severe: Marked limitation in activity, assistance required. Attack rate was calculated for each participant as the number of attacks occurring during the specified period divided by number of days the participant contributed to the specified period multiplied by 28 days.

    Time frame: Day 0 Through Day 182

  3. Number of Investigator-Confirmed Angioedema Attacks During the Presumed Steady State Period of Day 70 Through Day 182

    An angioedema attack was defined as the symptoms or signs consistent with an attack in at least 1 of the following locations: peripheral angioedema (cutaneous swelling involving an extremity, the face, neck, torso, and/or genitourinary region), abdominal angioedema (abdominal pain, with or without abdominal distention, nausea, vomiting, or diarrhea), laryngeal angioedema (stridor, dyspnea, difficulty speaking, difficulty swallowing, throat tightening, or swelling of the tongue, palate, uvula, or larynx). Number of investigator-confirmed angioedema attacks during the presumed steady state period of day 70 through day 182 were assessed. Attack rate was calculated for each participant as the number of attacks occurring during the specified period divided by the number of days the participant contributed to the specified period multiplied by 28 days.

    Time frame: Day 70 through Day 182

  4. Number of Participants Achieving Attack-Free Status During the Presumed Steady State Period of Day 70 Through Day 182

    An angioedema attack was defined as the symptoms or signs consistent with an attack in at least 1 of the following locations: peripheral angioedema (cutaneous swelling involving an extremity, the face, neck, torso, and/or genitourinary region), abdominal angioedema (abdominal pain, with or without abdominal distention, nausea, vomiting, or diarrhea), laryngeal angioedema (stridor, dyspnea, difficulty speaking, difficulty swallowing, throat tightening, or swelling of the tongue, palate, uvula, or larynx). A participant was considered as attack free during a time period if the participant has no investigator-confirmed angioedema attacks during that time period. For participants who discontinue the study prior to completion of the analysis period, participants were classified as attack-free or not based on the observed contribution to the analysis period. Number of participants achieving attack-free status during the presumed steady state period of day 70 through day 182 was assessed.

    Time frame: Day 70 through Day 182

  5. Number of Participants With Maximum Attack Severity During Treatment Period of Day 0 Through Day 182

    An angioedema attack was defined as the symptoms or signs consistent with an attack in at least 1 of the following locations: peripheral angioedema (cutaneous swelling involving an extremity, the face, neck, torso, and/or genitourinary region), abdominal angioedema (abdominal pain, with or without abdominal distention, nausea, vomiting, or diarrhea), laryngeal angioedema (stridor, dyspnea, difficulty speaking, difficulty swallowing, throat tightening, or swelling of the tongue, palate, uvula, or larynx). Number of participants with maximum attack severity during treatment period of day 0 through day 182 was assessed. Angioedema attack severity was calculated per participant based on the severity categories as follows: No attack, Mild, Moderate, and Severe.

    Time frame: Day 0 through Day 182

  6. Number of Investigator-Confirmed Moderate or Severe Angioedema Attacks During the Presumed Steady State Period of Day 70 Through Day 182

    An angioedema attack was defined as the symptoms or signs consistent with an attack in at least 1 of the following locations: peripheral angioedema (cutaneous swelling involving an extremity, the face, neck, torso, and/or genitourinary region), abdominal angioedema (abdominal pain, with or without abdominal distention, nausea, vomiting, or diarrhea), laryngeal angioedema (stridor, dyspnea, difficulty speaking, difficulty swallowing, throat tightening, or swelling of the tongue, palate, uvula, or larynx). Attack rate was calculated for each participant as the number of attacks occurring during the specified period divided by the number of days the participant contributed to the specified period multiplied by 28 days. Number of investigator-confirmed moderate or severe angioedema attacks during the presumed steady state period of day 70 through day 182 were assessed.

    Time frame: Day 70 through Day 182

  7. Number of Participants With Maximum Attack Severity During Presumed Steady State Period of Day 70 Through Day 182

    An angioedema attack was defined as the symptoms or signs consistent with an attack in at least 1 of the following locations: peripheral angioedema (cutaneous swelling involving an extremity, the face, neck, torso, and/or genitourinary region), abdominal angioedema (abdominal pain, with or without abdominal distention, nausea, vomiting, or diarrhea), laryngeal angioedema (stridor, dyspnea, difficulty speaking, difficulty swallowing, throat tightening, or swelling of the tongue, palate, uvula, or larynx). Number of participants with maximum attack severity during the presumed steady state period of day 70 through day 182 was assessed. Angioedema attack severity was calculated per participant based on the severity categories as follows: No attack, Mild, Moderate, and Severe.

    Time frame: Day 70 through Day 182

  8. Time to First Angioedema Attack After Day 0 Through Day 182

    The time to the first angioedema attack (days) after Day 0 for the efficacy evaluation period of Day 0 through Day 182 was calculated from the date and time of the first dose of lanadelumab for the efficacy evaluation period (Day 0 through Day 182) to the date and time of the first in angioedema attack after the first dose for the efficacy evaluation period of Day 0 through Day 182. Participants with attacks occurring were the events. Participants who discontinue/complete the study prior to having an angioedema attack were censored. The data is reported for baseline angioedema attack rate groups i.e. 1 to \< 2 Attacks/Month and \>=2 Attacks/Month.

    Time frame: Day 0 Through Day 182

  9. Time to First Angioedema Attack After Day 70 Through Day 182

    The time to the first angioedema attack (days) after Day 0 for the efficacy evaluation period of Day 70 through Day 182 was calculated from the date and time of the first dose of lanadelumab for the efficacy evaluation period (Day 70 through Day 182) to the date and time of the first in angioedema attack after the first dose for the efficacy evaluation period of Day 70 through Day 182. Participants with attacks occurring were the events. Participants who discontinue/complete the study prior to having an angioedema attack were censored. The data is reported for baseline angioedema attack rate groups i.e. 1 to \< 2 Attacks/Month and \>=2 Attacks/Month.

    Time frame: Day 70 through Day 182

  10. Number of Participants Achieving at Least 50 %, 70%, 90% and 100% Reduction in the Investigator-Confirmed Normalized Number of Attacks (NNA) Per 4 Weeks During Each of the Efficacy Evaluation Periods Relative to the Observation Period NNA

    The normalized number of investigator-confirmed angioedema attacks (NNA) during each efficacy evaluation period was expressed as a monthly (28 days) angioedema attack rate. Attack rate was calculated for each participant as the number of attacks occurring during the specified period divided by the number of days the participant contributed to the specified period multiplied by 28 days. Number of participants achieving at least 50 percent (%), 70%, 90% and 100% reduction in the investigator-confirmed normalized number of attacks per 4 weeks during each of the efficacy evaluation periods relative to the observation period NNA was assessed. The percentage reduction groups are not mutually exclusive, participants may appear in more than one group as applicable based on their percentage reduction.

    Time frame: Day 0 Through Day 182

  11. Number of Participants Achieving Normalized Number of Attacks (NNA) Less Than (<)1.0 Per 4 Weeks During Each of the Efficacy Evaluation Periods

    The normalized number of investigator-confirmed angioedema attacks (NNA) during each efficacy evaluation period was expressed as a monthly (28 days) angioedema attack rate. Attack rate was calculated for each participant as the number of attacks occurring during the specified period divided by the number of days the participant contributed to the specified period multiplied by 28 days. Number of participants achieving normalized number of attacks \< 1.0 per 4 weeks during each of the efficacy evaluation periods was assessed. The percentage reduction groups are not mutually exclusive, participants may appear in more than one group as applicable based on their percentage reduction.

    Time frame: Day 0 through Day 182, Day 70 through Day 182

  12. Number of Participants With Treatment Emergent Adverse Events (TEAEs) Including Adverse Events of Special Interest (AESI) and Serious Adverse Events (SAEs)

    TEAE was defined as any event emerging or manifesting at or after the initiation of treatment with an investigational product (IP) or medicinal product or any existing event that worsens in either intensity or frequency following exposure to the IP or medicinal product. SAE=untoward clinical manifestation of signs, symptoms or outcomes (whether considered related to investigational product or not and at any dose: results in death, is life-threatening, requires inpatient hospitalization or prolongation of hospitalization, results in persistent or significant disability/incapacity, congenital abnormality/birth defect, an important medical event. AESI included hypersensitivity reactions, events of disordered coagulation such as bleeding AESI, hypercoagulable AESI.

    Time frame: From the first study drug administration up to follow-up (Day 196)

  13. Plasma Concentrations of Lanadelumab

    Time frame: Pre-dose and post-dose at Days 0, 4, 14, 28, 56, 84, 112, 140, 168 and 182

  14. Plasma Kallikrein (pKal) Activity

    Plasma Kallikrein activity was measured by biomarker cleaved high molecular weight kininogen (cHMWK ) level to assess pharmacodynamics of lanadelumab.

    Time frame: Pre-dose and post-dose at Days 4, 14, 28, 56, 84, 112, 140, 168 and 182

  15. Number of Participants With Neutralizing or Non-neutralizing Antidrug Antibodies (ADA) in Plasma

    Number of participants with neutralizing or non-neutralizing antidrug antibodies in plasma was assessed.

    Time frame: Pre-dose and post-dose at Days 28, 56, 84, 112, 140, 168 and 182

  16. Number of Participants With Change in Total Angioedema Quality of Life (AE-QoL) Questionnaire Score During the Treatment Period of Day 0 Through Day 182

    The AE-QoL questionnaire was a self-administered validated instrument to assess health related (HR) QoL among participants with recurrent angioedema. The AE-QoL consisted of 17 disease-specific quality-of-life items, to produce a total AEQoL score and 4 domain scores (functioning, fatigue/mood, fear/shame, and nutrition) and each of the 17 items has a five point response scale ranging from 0 (Never) to 4 (Very Often). The raw total score (mean of all item scores) was rescaled using linear transformations into final percentage scores ranging 0 to 100. Swelling episodes (SE); Trouble Concentrating (TC); Food and Beverages (F\&B); negative effects (NE).

    Time frame: Baseline through Day 182

07

Results

Posted Dec 27, 2023

Participant flow

Participants took part in the study at 34 investigative sites in Canada, United States, Germany, Hungary, Italy, Spain, France, Japan, Netherlands, and Poland from 04 May 2020 to 20 October 2022.

Participant flow — Overall Study
MilestonePlaceboLanadelumab 300 mg
Started2750
Steady state full analysis set (ss-fas)2749
Completed2649
Not completed11
Withdrew: Adverse event01
Withdrew: Withdrawal by subject10

Outcome measures

PrimaryNumber of Investigator-Confirmed Angioedema Attacks During the Treatment Period of Day 0 Through Day 182

An angioedema attack was defined as the symptoms or signs consistent with an attack in at least 1 of the following locations: peripheral angioedema (cutaneous swelling involving an extremity, the face, neck, torso, and/or genitourinary region), abdominal angioedema (abdominal pain, with or without abdominal distention, nausea, vomiting, or diarrhea), laryngeal angioedema (stridor, dyspnea, difficulty speaking, difficulty swallowing, throat tightening, or swelling of the tongue, palate, uvula, or larynx). Attack rate was calculated for each participant as the number of attacks occurring during the specified period divided by the number of days the participant contributed to the specified period multiplied by 28 days. Number of investigator-confirmed angioedema attacks during the treatment period of Day 0 through Day 182 was assessed.

Time frame:
Day 0 through Day 182
Reported as:
Mean · attacks/month
Number of Investigator-Confirmed Angioedema Attacks During the Treatment Period of Day 0 Through Day 182
attacks/monthPlaceboLanadelumab 300 mg
Number of Investigator-Confirmed Angioedema Attacks During the Treatment Period of Day 0 Through Day 1821.63 ± 1.3572.17 ± 2.062
Statistical analysis
  • Placebo vs Lanadelumab 300 mg · Chi-squared · p = =0.899 (P-value was from Wald-based chi-square test; unadjusted for multiple testing.) · Rate ratio: 1.02 · 95% CI 0.71 to 1.47
SecondaryNumber of Participants Achieving Attack-Free Status During the Treatment Period of Day 0 Through Day 182

An angioedema attack was defined as the symptoms or signs consistent with an attack in at least 1 of the following locations: peripheral angioedema (cutaneous swelling involving an extremity, the face, neck, torso, and/or genitourinary region), abdominal angioedema (abdominal pain, with or without abdominal distention, nausea, vomiting, or diarrhea), laryngeal angioedema (stridor, dyspnea, difficulty speaking, difficulty swallowing, throat tightening, or swelling of the tongue, palate, uvula, or larynx). A participant was considered as attack free during a time period if the participant has no investigator-confirmed angioedema attacks during that time period. For participants who discontinue the study prior to completion of the analysis period, participants were classified as attack-free or not based on the observed contribution to the analysis period. Number of participants achieving attack-free status during the treatment period of day 0 through day 182 was assessed.

Time frame:
Day 0 through Day 182
Reported as:
Count of participants · Participants
Number of Participants Achieving Attack-Free Status During the Treatment Period of Day 0 Through Day 182
ParticipantsPlaceboLanadelumab 300 mg
Number of Participants Achieving Attack-Free Status During the Treatment Period of Day 0 Through Day 18212
Statistical analysis
  • Placebo vs Lanadelumab 300 mg · Cochran-Mantel-Haenszel · p = =1.000 (P-value was from the corresponding Mantel-Haenszel estimate for the common risk difference from Cochran-Mantel-Haenszel (CMH) test; unadjusted for multiple testing.) · Risk difference (rd): 0.003 · 95% CI -0.153 to 0.114
SecondaryNumber of Investigator-Confirmed Moderate or Severe Angioedema Attacks During the Treatment Period of Day 0 Through Day 182

Angioedema attack was defined as symptoms or signs consistent with an attack in at least 1 of the following locations: peripheral angioedema (cutaneous swelling involving an extremity, face, neck, torso, and/or genitourinary region), abdominal angioedema (abdominal pain, with or without abdominal distention, nausea, vomiting, or diarrhea), laryngeal angioedema (stridor, dyspnea, difficulty speaking, difficulty swallowing, throat tightening, or swelling of tongue, palate, uvula, or larynx). Overall severity of the participant's angioedema attack was determined by site using the following definitions: 1. Mild: Transient or mild discomfort; 2. Moderate: Mild to moderate limitation in activity some assistance needed; 3. Severe: Marked limitation in activity, assistance required. Attack rate was calculated for each participant as the number of attacks occurring during the specified period divided by number of days the participant contributed to the specified period multiplied by 28 days.

Time frame:
Day 0 Through Day 182
Reported as:
Mean · attacks/month
Number of Investigator-Confirmed Moderate or Severe Angioedema Attacks During the Treatment Period of Day 0 Through Day 182
attacks/monthPlaceboLanadelumab 300 mg
Number of Investigator-Confirmed Moderate or Severe Angioedema Attacks During the Treatment Period of Day 0 Through Day 1821.10 ± 0.9841.45 ± 1.711
Statistical analysis
  • Placebo vs Lanadelumab 300 mg · Chi-squared · p = =0.852 (P-value was from Wald-based chi-square test; unadjusted for multiple testing.) · Rate ratio: 0.96 · 95% CI 0.62 to 1.48
SecondaryNumber of Investigator-Confirmed Angioedema Attacks During the Presumed Steady State Period of Day 70 Through Day 182

An angioedema attack was defined as the symptoms or signs consistent with an attack in at least 1 of the following locations: peripheral angioedema (cutaneous swelling involving an extremity, the face, neck, torso, and/or genitourinary region), abdominal angioedema (abdominal pain, with or without abdominal distention, nausea, vomiting, or diarrhea), laryngeal angioedema (stridor, dyspnea, difficulty speaking, difficulty swallowing, throat tightening, or swelling of the tongue, palate, uvula, or larynx). Number of investigator-confirmed angioedema attacks during the presumed steady state period of day 70 through day 182 were assessed. Attack rate was calculated for each participant as the number of attacks occurring during the specified period divided by the number of days the participant contributed to the specified period multiplied by 28 days.

Time frame:
Day 70 through Day 182
Reported as:
Mean · attacks/month
Number of Investigator-Confirmed Angioedema Attacks During the Presumed Steady State Period of Day 70 Through Day 182
attacks/monthPlaceboLanadelumab 300 mg
Number of Investigator-Confirmed Angioedema Attacks During the Presumed Steady State Period of Day 70 Through Day 1821.37 ± 1.2312.05 ± 2.211
Statistical analysis
  • Placebo vs Lanadelumab 300 mg · Chi-squared · p = =0.660 (P-value was from Wald-based chi-square test; unadjusted for multiple testing.) · Rate ratio: 1.10 · 95% CI 0.72 to 1.70
SecondaryNumber of Participants Achieving Attack-Free Status During the Presumed Steady State Period of Day 70 Through Day 182

An angioedema attack was defined as the symptoms or signs consistent with an attack in at least 1 of the following locations: peripheral angioedema (cutaneous swelling involving an extremity, the face, neck, torso, and/or genitourinary region), abdominal angioedema (abdominal pain, with or without abdominal distention, nausea, vomiting, or diarrhea), laryngeal angioedema (stridor, dyspnea, difficulty speaking, difficulty swallowing, throat tightening, or swelling of the tongue, palate, uvula, or larynx). A participant was considered as attack free during a time period if the participant has no investigator-confirmed angioedema attacks during that time period. For participants who discontinue the study prior to completion of the analysis period, participants were classified as attack-free or not based on the observed contribution to the analysis period. Number of participants achieving attack-free status during the presumed steady state period of day 70 through day 182 was assessed.

Time frame:
Day 70 through Day 182
Reported as:
Count of participants · Participants
Number of Participants Achieving Attack-Free Status During the Presumed Steady State Period of Day 70 Through Day 182
ParticipantsPlaceboLanadelumab 300 mg
Number of Participants Achieving Attack-Free Status During the Presumed Steady State Period of Day 70 Through Day 18243
Statistical analysis
  • Placebo vs Lanadelumab 300 mg · Cochran-Mantel-Haenszel · p = =0.250 (P-value was from the corresponding Mantel-Haenszel estimate for the common risk difference from CMH test; unadjusted for multiple testing.) · Risk difference (rd): -0.087 · 95% CI -0.280 to 0.063
SecondaryNumber of Participants With Maximum Attack Severity During Treatment Period of Day 0 Through Day 182

An angioedema attack was defined as the symptoms or signs consistent with an attack in at least 1 of the following locations: peripheral angioedema (cutaneous swelling involving an extremity, the face, neck, torso, and/or genitourinary region), abdominal angioedema (abdominal pain, with or without abdominal distention, nausea, vomiting, or diarrhea), laryngeal angioedema (stridor, dyspnea, difficulty speaking, difficulty swallowing, throat tightening, or swelling of the tongue, palate, uvula, or larynx). Number of participants with maximum attack severity during treatment period of day 0 through day 182 was assessed. Angioedema attack severity was calculated per participant based on the severity categories as follows: No attack, Mild, Moderate, and Severe.

Time frame:
Day 0 through Day 182
Reported as:
Count of participants · Participants
Number of Participants With Maximum Attack Severity During Treatment Period of Day 0 Through Day 182
ParticipantsPlaceboLanadelumab 300 mg
No Attack12
Mild24
Moderate1717
Severe727
SecondaryNumber of Investigator-Confirmed Moderate or Severe Angioedema Attacks During the Presumed Steady State Period of Day 70 Through Day 182

An angioedema attack was defined as the symptoms or signs consistent with an attack in at least 1 of the following locations: peripheral angioedema (cutaneous swelling involving an extremity, the face, neck, torso, and/or genitourinary region), abdominal angioedema (abdominal pain, with or without abdominal distention, nausea, vomiting, or diarrhea), laryngeal angioedema (stridor, dyspnea, difficulty speaking, difficulty swallowing, throat tightening, or swelling of the tongue, palate, uvula, or larynx). Attack rate was calculated for each participant as the number of attacks occurring during the specified period divided by the number of days the participant contributed to the specified period multiplied by 28 days. Number of investigator-confirmed moderate or severe angioedema attacks during the presumed steady state period of day 70 through day 182 were assessed.

Time frame:
Day 70 through Day 182
Reported as:
Mean · attacks/month
Number of Investigator-Confirmed Moderate or Severe Angioedema Attacks During the Presumed Steady State Period of Day 70 Through Day 182
attacks/monthPlaceboLanadelumab 300 mg
Number of Investigator-Confirmed Moderate or Severe Angioedema Attacks During the Presumed Steady State Period of Day 70 Through Day 1820.97 ± 1.0131.35 ± 1.764
Statistical analysis
  • Placebo vs Lanadelumab 300 mg · Chi-squared · p = =0.896 (P-value was from Wald-based chi-square test; unadjusted for multiple testing.) · Rate ratio: 0.97 · 95% CI 0.58 to 1.61
SecondaryNumber of Participants With Maximum Attack Severity During Presumed Steady State Period of Day 70 Through Day 182

An angioedema attack was defined as the symptoms or signs consistent with an attack in at least 1 of the following locations: peripheral angioedema (cutaneous swelling involving an extremity, the face, neck, torso, and/or genitourinary region), abdominal angioedema (abdominal pain, with or without abdominal distention, nausea, vomiting, or diarrhea), laryngeal angioedema (stridor, dyspnea, difficulty speaking, difficulty swallowing, throat tightening, or swelling of the tongue, palate, uvula, or larynx). Number of participants with maximum attack severity during the presumed steady state period of day 70 through day 182 was assessed. Angioedema attack severity was calculated per participant based on the severity categories as follows: No attack, Mild, Moderate, and Severe.

Time frame:
Day 70 through Day 182
Reported as:
Count of participants · Participants
Number of Participants With Maximum Attack Severity During Presumed Steady State Period of Day 70 Through Day 182
ParticipantsPlaceboLanadelumab 300 mg
No Attack43
Mild55
Moderate1223
Severe618
SecondaryTime to First Angioedema Attack After Day 0 Through Day 182

The time to the first angioedema attack (days) after Day 0 for the efficacy evaluation period of Day 0 through Day 182 was calculated from the date and time of the first dose of lanadelumab for the efficacy evaluation period (Day 0 through Day 182) to the date and time of the first in angioedema attack after the first dose for the efficacy evaluation period of Day 0 through Day 182. Participants with attacks occurring were the events. Participants who discontinue/complete the study prior to having an angioedema attack were censored. The data is reported for baseline angioedema attack rate groups i.e. 1 to \< 2 Attacks/Month and \>=2 Attacks/Month.

Time frame:
Day 0 Through Day 182
Reported as:
Median · days
Time to First Angioedema Attack After Day 0 Through Day 182
daysPlaceboLanadelumab 300 mg
1 to <2 Attacks/Month10.5 (6.6 to NA)81.0 (6.4 to NA)
>=2 Attacks/Month6.8 (1.4 to 11.6)5.9 (3.7 to 11.6)
Statistical analysis
  • Placebo vs Lanadelumab 300 mg · Log Rank · p = =0.498 (P-value comparing lanadelumab to placebo was from a log rank test stratified by baseline strata.)
SecondaryTime to First Angioedema Attack After Day 70 Through Day 182

The time to the first angioedema attack (days) after Day 0 for the efficacy evaluation period of Day 70 through Day 182 was calculated from the date and time of the first dose of lanadelumab for the efficacy evaluation period (Day 70 through Day 182) to the date and time of the first in angioedema attack after the first dose for the efficacy evaluation period of Day 70 through Day 182. Participants with attacks occurring were the events. Participants who discontinue/complete the study prior to having an angioedema attack were censored. The data is reported for baseline angioedema attack rate groups i.e. 1 to \< 2 Attacks/Month and \>=2 Attacks/Month.

Time frame:
Day 70 through Day 182
Reported as:
Median · days
Time to First Angioedema Attack After Day 70 Through Day 182
daysPlaceboLanadelumab 300 mg
1 to <2 Attacks/Month12.3 (10.3 to NA)40.8 (3.4 to NA)
>=2 Attacks/Month16.9 (6.7 to 32.5)10.6 (5.0 to 15.9)
Statistical analysis
  • Placebo vs Lanadelumab 300 mg · Log Rank · p = =0.184 (P-value comparing lanadelumab to placebo was from a log rank test stratified by baseline strata.)
SecondaryNumber of Participants Achieving at Least 50 %, 70%, 90% and 100% Reduction in the Investigator-Confirmed Normalized Number of Attacks (NNA) Per 4 Weeks During Each of the Efficacy Evaluation Periods Relative to the Observation Period NNA

The normalized number of investigator-confirmed angioedema attacks (NNA) during each efficacy evaluation period was expressed as a monthly (28 days) angioedema attack rate. Attack rate was calculated for each participant as the number of attacks occurring during the specified period divided by the number of days the participant contributed to the specified period multiplied by 28 days. Number of participants achieving at least 50 percent (%), 70%, 90% and 100% reduction in the investigator-confirmed normalized number of attacks per 4 weeks during each of the efficacy evaluation periods relative to the observation period NNA was assessed. The percentage reduction groups are not mutually exclusive, participants may appear in more than one group as applicable based on their percentage reduction.

Time frame:
Day 0 Through Day 182
Reported as:
Count of participants · Participants
Number of Participants Achieving at Least 50 %, 70%, 90% and 100% Reduction in the Investigator-Confirmed Normalized Number of Attacks (NNA) Per 4 Weeks During Each of the Efficacy Evaluation Periods Relative to the Observation Period NNA
ParticipantsPlaceboLanadelumab 300 mg
>=50% Reduction1328
>=70% Reduction912
>=90% Reduction36
100% Reduction12
SecondaryNumber of Participants Achieving Normalized Number of Attacks (NNA) Less Than (<)1.0 Per 4 Weeks During Each of the Efficacy Evaluation Periods

The normalized number of investigator-confirmed angioedema attacks (NNA) during each efficacy evaluation period was expressed as a monthly (28 days) angioedema attack rate. Attack rate was calculated for each participant as the number of attacks occurring during the specified period divided by the number of days the participant contributed to the specified period multiplied by 28 days. Number of participants achieving normalized number of attacks \< 1.0 per 4 weeks during each of the efficacy evaluation periods was assessed. The percentage reduction groups are not mutually exclusive, participants may appear in more than one group as applicable based on their percentage reduction.

Time frame:
Day 0 through Day 182, Day 70 through Day 182
Reported as:
Count of participants · Participants
Number of Participants Achieving Normalized Number of Attacks (NNA) Less Than (<)1.0 Per 4 Weeks During Each of the Efficacy Evaluation Periods
ParticipantsPlaceboLanadelumab 300 mg
>=50% Reduction1431
>=70% Reduction1218
>=90% Reduction55
100% Reduction43
SecondaryNumber of Participants With Treatment Emergent Adverse Events (TEAEs) Including Adverse Events of Special Interest (AESI) and Serious Adverse Events (SAEs)

TEAE was defined as any event emerging or manifesting at or after the initiation of treatment with an investigational product (IP) or medicinal product or any existing event that worsens in either intensity or frequency following exposure to the IP or medicinal product. SAE=untoward clinical manifestation of signs, symptoms or outcomes (whether considered related to investigational product or not and at any dose: results in death, is life-threatening, requires inpatient hospitalization or prolongation of hospitalization, results in persistent or significant disability/incapacity, congenital abnormality/birth defect, an important medical event. AESI included hypersensitivity reactions, events of disordered coagulation such as bleeding AESI, hypercoagulable AESI.

Time frame:
From the first study drug administration up to follow-up (Day 196)
Reported as:
Count of participants · Participants
Number of Participants With Treatment Emergent Adverse Events (TEAEs) Including Adverse Events of Special Interest (AESI) and Serious Adverse Events (SAEs)
ParticipantsPlaceboLanadelumab 300 mg
Any TEAE2346
AESI01
SAE17
SecondaryPlasma Concentrations of Lanadelumab
Time frame:
Pre-dose and post-dose at Days 0, 4, 14, 28, 56, 84, 112, 140, 168 and 182
Reported as:
Mean · nanogram/milliliter (ng/mL)
Plasma Concentrations of Lanadelumab
nanogram/milliliter (ng/mL)PlaceboLanadelumab 300 mg
Baseline661.573 ± 2991.13631.665 ± 7.8812
Day 0—0.000 ± NA
Day 442.749 ± 113.102116895.996 ± 8136.5164
Day 145.366 ± 21.465011030.519 ± 4632.9383
Day 286.188 ± 17.994415969.813 ± 7210.5963
Day 5616.820 ± 61.302120722.131 ± 8396.5980
Day 847.335 ± 30.084822698.616 ± 8953.3488
Day 1125.604 ± 22.184322938.312 ± 10021.8340
Day 1403.200 ± 16.318822778.286 ± 9680.4686
Day 1689.260 ± 23.076321369.818 ± 11072.0806
Day 1824.733 ± 18.701420496.158 ± 10774.2169
SecondaryPlasma Kallikrein (pKal) Activity

Plasma Kallikrein activity was measured by biomarker cleaved high molecular weight kininogen (cHMWK ) level to assess pharmacodynamics of lanadelumab.

Time frame:
Pre-dose and post-dose at Days 4, 14, 28, 56, 84, 112, 140, 168 and 182
Reported as:
Mean · % cHMWK
Plasma Kallikrein (pKal) Activity
% cHMWKPlaceboLanadelumab 300 mg
Baseline20.30 ± 14.92718.69 ± 11.854
Day 425.94 ± 33.28520.20 ± 20.333
Day 1417.23 ± 9.80112.83 ± 13.136
Day 2816.16 ± 12.45814.24 ± 13.472
Day 5617.83 ± 12.16915.88 ± 15.618
Day 8417.00 ± 15.50816.76 ± 15.941
Day 11215.88 ± 11.10916.12 ± 17.242
Day 14017.40 ± 15.41314.91 ± 14.656
Day 16820.90 ± 16.58815.07 ± 15.061
Day 18218.08 ± 20.38415.39 ± 15.333
SecondaryNumber of Participants With Neutralizing or Non-neutralizing Antidrug Antibodies (ADA) in Plasma

Number of participants with neutralizing or non-neutralizing antidrug antibodies in plasma was assessed.

Time frame:
Pre-dose and post-dose at Days 28, 56, 84, 112, 140, 168 and 182
Reported as:
Count of participants · Participants
Number of Participants With Neutralizing or Non-neutralizing Antidrug Antibodies (ADA) in Plasma
ParticipantsPlaceboLanadelumab 300 mg
Baseline00
Day 2800
Day 5600
Day 8400
Day 11201
Day 14001
Day 16800
Day 18202
SecondaryNumber of Participants With Change in Total Angioedema Quality of Life (AE-QoL) Questionnaire Score During the Treatment Period of Day 0 Through Day 182

The AE-QoL questionnaire was a self-administered validated instrument to assess health related (HR) QoL among participants with recurrent angioedema. The AE-QoL consisted of 17 disease-specific quality-of-life items, to produce a total AEQoL score and 4 domain scores (functioning, fatigue/mood, fear/shame, and nutrition) and each of the 17 items has a five point response scale ranging from 0 (Never) to 4 (Very Often). The raw total score (mean of all item scores) was rescaled using linear transformations into final percentage scores ranging 0 to 100. Swelling episodes (SE); Trouble Concentrating (TC); Food and Beverages (F\&B); negative effects (NE).

Time frame:
Baseline through Day 182
Reported as:
Count of participants · Participants
Number of Participants With Change in Total Angioedema Quality of Life (AE-QoL) Questionnaire Score During the Treatment Period of Day 0 Through Day 182
ParticipantsPlaceboLanadelumab 300 mg
Baseline: Work - Never76
Baseline: Work - Rarely48
Baseline: Work - Occasionally614
Baseline: Work - Often710
Baseline: Work - Very Often210
Baseline: Physical activity - Never14
Baseline: Physical activity - Rarely17
Baseline: Physical activity - Occasionally1615
Baseline: Physical activity - Often412
Baseline: Physical activity - Very Often411
Baseline: Leisure time - Never14
Baseline: Leisure time - Rarely59
Baseline: Leisure time - Occasionally1217
Baseline: Leisure time - Often515
Baseline: Leisure time - Very Often34
Baseline: Social relations - Never24
Baseline: Social relations - Rarely49
Baseline: Social relations - Occasionally1216
Baseline: Social relations - Often716
Baseline: Social relations - Very Often14
Baseline: Eating and drinking - Never38
Baseline: Eating and drinking - Rarely610
Baseline: Eating and drinking - Occasionally916
Baseline: Eating and drinking - Often613
Baseline: Eating and drinking - Very often22
Baseline: Difficulty falling asleep - Never37
Baseline: Difficulty falling asleep - Rarely37
Baseline: Difficulty falling asleep - Occasionally1117
Baseline: Difficulty falling asleep - Often58
Baseline: Difficulty falling asleep - Very often410
Baseline: Wake up during the night - Never22
Baseline: Wake up during the night - Rarely711
Baseline: Wake up during the night - Occasionally512
Baseline: Wake up during the night - Often610
Baseline: Wake up during the night - Very often614
Baseline: Tired during the day - Never13
Baseline: Tired during the day - Rarely78
Baseline: Tired during the day - Occasionally616
Baseline: Tired during the day - Often79
Baseline: Tired during the day - Very often513
Baseline: Trouble concentrating - Never23
Baseline: Trouble concentrating - Rarely814
Baseline: Trouble concentrating - Occasionally1014
Baseline: Trouble concentrating - Often410
Baseline: Trouble concentrating - Very often28
Baseline: Feel depressed - Never910
Baseline: Feel depressed - Rarely518
Baseline: Feel depressed - Occasionally511
Baseline: Feel depressed - Often67
Baseline: Feel depressed - Very often13
Baseline: Limit your choices of food or beverages - Never1017
Baseline: Limit your choices of food or beverages - Rarely14
Baseline: Limit your choices of food or beverages - Occasionally213
Baseline: Limit your choices of food or beverages - Often87
Baseline: Limit your choices of food or beverages - Very often58
Baseline: Swelling episodes place a burden on you - Never11
Baseline: Swelling episodes place a burden on you - Rarely10
Baseline: Swelling episodes place a burden on you - Occasionally78
Baseline: Swelling episodes place a burden on you - Often1024
Baseline: Swelling episodes place a burden on you - Very often716
Baseline: Swelling episode could occur suddenly - Never12
Baseline: Swelling episode could occur suddenly - Rarely41
Baseline: Swelling episode could occur suddenly - Occasionally412
Baseline: Swelling episode could occur suddenly - Often616
Baseline: Swelling episode could occur suddenly - Very often1118
Baseline: Freq of swelling episodes might increase - Never21
Baseline: Freq of swelling episodes might increase - Rarely33
Baseline: Freq of swelling episodes might increase - Occasionally57
Baseline: Freq of swelling episodes might increase - Often821
Baseline: Freq of swelling episodes might increase - Very often817
Baseline: Ashamed to go out due to swell episodes - Never610
Baseline: Ashamed to go out due to swell episodes - Rarely17
Baseline: Ashamed to go out due to swell episodes - Occasionally810
Baseline: Ashamed to go out due to swell episodes - Often411
Baseline: Ashamed to go out due to swell episodes - Very often711
Baseline: Swelling episodes make you embarrassed - Never59
Baseline: Swelling episodes make you embarrassed - Rarely45
Baseline: Swelling episodes make you embarrassed - Occasionally613
Baseline: Swelling episodes make you embarrassed - Often38
Baseline: Swelling episodes make you embarrassed - Very often814
Baseline: Afraid of long term negative effects - Never39
Baseline: Afraid of long term negative effects - Rarely615
Baseline: Afraid of long term negative effects - Occasionally64
Baseline: Afraid of long term negative effects - Often612
Baseline: Afraid of long term negative effects - Very often59
Day 182: Work - Never317
Day 182: Work - Rarely108
Day 182: Work - Occasionally812
Day 182: Work - Often410
Day 182: Work - Very Often13
Day 182: Physical activity - Never313
Day 182: Physical activity - Rarely1012
Day 182: Physical activity - Occasionally813
Day 182: Physical activity - Often48
Day 182: Physical activity - Very often14
Day 182: Leisure time - Never314
Day 182: Leisure time - Rarely1215
Day 182: Leisure time - Occasionally710
Day 182: Leisure time - Often37
Day 182: Leisure time - Very often14
Day 182: Social relations - Never415
Day 182: Social relations - Rarely811
Day 182: Social relations - Occasionally913
Day 182: Social relations - Often26
Day 182: Social relations - Very often35
Day 182: Eating and drinking - Never518
Day 182: Eating and drinking - Rarely88
Day 182: Eating and drinking - Occasionally89
Day 182: Eating and drinking - Often414
Day 182: Eating and drinking - Very often11
Day 182: Difficulty falling asleep - Never49
Day 182: Difficulty falling asleep - Rarely715
Day 182: Difficulty falling asleep - Occasionally812
Day 182: Difficulty falling asleep - Often69
Day 182: Difficulty falling asleep - Very often15
Day 182: Wake up during the night - Never19
Day 182: Wake up during the night - Rarely710
Day 182: Wake up during the night - Occasionally815
Day 182: Wake up during the night - Often79
Day 182: Wake up during the night - Very often37
Day 182: Tired during the day - Never29
Day 182: Tired during the day - Rarely615
Day 182: Tired during the day - Occasionally1112
Day 182: Tired during the day - Often69
Day 182: Tired during the day - Very often15
Day 182: Trouble concentrating - Never213
Day 182: Trouble concentrating - Rarely1710
Day 182: Trouble concentrating - Occasionally514
Day 182: Trouble concentrating - Often110
Day 182: Trouble concentrating - Very often13
Day 182: Feel depressed - Never818
Day 182: Feel depressed - Rarely818
Day 182: Feel depressed - Occasionally57
Day 182: Feel depressed - Often45
Day 182: Feel depressed - Very often12
Day 182: Limit your choices of food or beverages - Never719
Day 182: Limit your choices of food or beverages - Rarely68
Day 182: Limit your choices of food or beverages - Occasionally610
Day 182: Limit your choices of food or beverages - Often58
Visit 26: Limit your choices of food or beverages - Very often25
Day 182: Swelling episodes place a burden on you - Never26
Day 182: Swelling episodes place a burden on you - Rarely79
Day 182: Swelling episodes place a burden on you - Occasionally817
Day 182: Swelling episodes place a burden on you - Often77
Day 182: Swelling episodes place a burden on you - Very often211
Day 182: Swelling episode could occur suddenly - Never27
Day 182: Swelling episode could occur suddenly - Rarely614
Day 182: Swelling episode could occur suddenly - Occasionally910
Day 182: Swelling episode could occur suddenly - Often57
Day 182: Swelling episode could occur suddenly - Very often412
Day 182: Freq of swelling episodes might increase - Never27
Day 182: Freq of swelling episodes might increase - Rarely712
Day 182: Freq of swelling episodes might increase - Occasionally913
Day 182: Freq of swelling episodes might increase - Often56
Day 182: Freq of swelling episodes might increase - Very often312
Day 182: Ashamed to go out due to swell episodes - Never515
Day 182: Ashamed to go out due to swell episodes - Rarely811
Day 182: Ashamed to go out due to swell episodes - Occasionally410
Day 182: Ashamed to go out due to swell episodes - Often78
Day 182: Ashamed to go out due to swell episodes - Very often26
Day 182: Swelling episodes make you embarrassed - Never714
Day 182: Swelling episodes make you embarrassed - Rarely510
Day 182: Swelling episodes make you embarrassed - Occasionally610
Day 182: Swelling episodes make you embarrassed - Often68
Day 182: Swelling episodes make you embarrassed - Very often28
Day 182: Afraid of long term negative effects - Never415
Day 182: Afraid of long term negative effects - Rarely1013
Day 182: Afraid of long term negative effects - Occasionally711
Day 182: Afraid of long term negative effects - Often13
Day 182: Afraid of long term negative effects - Very often48

Adverse events

Collected over From start of the study up to follow up (Day 196). Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Placebo0/27 (0%)1/27 (3.7%)27/27 (100%)
Lanadelumab 300 mg0/50 (0%)7/50 (14%)49/50 (98%)
Most frequent serious events
Most frequent serious events
EventPlaceboLanadelumab 300 mg
AngioedemaSkin and subcutaneous tissue disorders1/276/50
Cellulitis staphylococcalInfections and infestations0/271/50
LymphoedemaVascular disorders0/271/50
Most frequent other events
Showing 10 of 22
Most frequent other events
EventPlaceboLanadelumab 300 mg
AngioedemaSkin and subcutaneous tissue disorders26/2748/50
Injection site painGeneral disorders7/2715/50
HeadacheNervous system disorders6/276/50
COVID-19Infections and infestations4/273/50
ArthralgiaMusculoskeletal and connective tissue disorders2/277/50
NauseaGastrointestinal disorders3/274/50
Injection site erythemaGeneral disorders3/273/50
Upper respiratory tract infectionInfections and infestations3/273/50
InsomniaPsychiatric disorders3/271/50
FatigueGeneral disorders2/274/50

Baseline characteristics

Safety analysis set (SAS) included all participants who received any exposure to the investigational product.

Age, Continuous
Age, Continuous(years)PlaceboLanadelumab 300 mgTotal
Mean43.8 ± 10.7742.3 ± 14.0642.8 ± 12.94
Sex: Female, Male
Sex: Female, Male(Participants)PlaceboLanadelumab 300 mgTotal
Female194362
Male8715
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)PlaceboLanadelumab 300 mgTotal
Hispanic or Latino279
Not Hispanic or Latino244367
Unknown or Not Reported101
Race (NIH/OMB)
Race (NIH/OMB)(Participants)PlaceboLanadelumab 300 mgTotal
American Indian or Alaska Native000
Asian224
Native Hawaiian or Other Pacific Islander000
Black or African American044
White244468
More than one race000
Unknown or Not Reported101
Region of Enrollment
Region of Enrollment(Participants)PlaceboLanadelumab 300 mgTotal
Canada145
France011
Germany123
Hungary112
Italy369
Japan224
Netherlands224
Poland426
Spain123
United States122840
Height
Height(centimeter)PlaceboLanadelumab 300 mgTotal
Mean168.32 ± 9.779166.09 ± 8.232166.87 ± 8.807
Weight
Weight(kilogram)PlaceboLanadelumab 300 mgTotal
Mean82.09 ± 22.70182.04 ± 25.21782.06 ± 24.213
Body Mass Index (BMI)
Body Mass Index (BMI)(kilogram per squared meter)PlaceboLanadelumab 300 mgTotal
Mean28.88 ± 7.41329.75 ± 9.12729.44 ± 8.525
08

Study locations

45 sites
  • Clinical Research Center of Alabama
    Birmingham, Alabama 35209, United States
  • Medical Research of Arizona
    Scottsdale, Arizona 85248, United States
  • University of California San Diego
    San Diego, California 92122, United States
  • AIRE Medical of Los Angeles
    Santa Monica, California 90404, United States
  • Allergy and Asthma Clinical Research Inc
    Walnut Creek, California 94598, United States
  • Asthma and Allergy Associates, PC
    Colorado Springs, Colorado 80907, United States
  • University of South Florida Asthma, Allergy & Immunology
    Tampa, Florida 33613, United States
  • Rush University Medical Center
    Chicago, Illinois 60612, United States
  • Kanarek Allergy, Asthma and Immunology
    Overland Park, Kansas 66211, United States
  • Institute for Asthma & Allergy - Chevy Chase
    Chevy Chase, Maryland 20815, United States
  • Massachusetts General Hospital
    Boston, Massachusetts 02421, United States
  • University of Michigan
    Ann Arbor, Michigan 48106, United States
  • Mayo Clinic - Rochester
    Rochester, Minnesota 55905, United States
  • Washington University
    Saint Louis, Missouri 63141, United States
  • Jay M Kashkin, MD Allergy, Asthma and Immunology
    Fair Lawn, New Jersey 07410, United States
  • Clinical Research of Charlotte
    Charlotte, North Carolina 28277, United States
  • Bernstein Clinical Research Center, LLC
    Cincinnati, Ohio 45231, United States
  • Optimed Research, LTD
    Columbus, Ohio 43235, United States
  • Tanner Clinic
    Layton, Utah 84041, United States
  • Seattle Allergy & Asthma Research Institute
    Seattle, Washington 98115, United States
  • Ottawa Allergy Research Corporation
    Ottawa, Ontario K1G 6C6, Canada
  • Clinique Specialisee en Allergie de la Capitale
    Québec, Quebec G1V 4W2, Canada
  • CHU Grenoble Alpes, service de médecine interne, bureau de recherche clinique
    Isere, 38043, France
  • Service médecine interne, hôpital Saint Antoine
    Paris, 75012, France
  • Klinikum der Johann Wolfgang Goethe-Universitaet
    Frankfurt, Hessen 60590, Germany
  • Universitaetsmedizin der Johannes Gutenberg-Universitaet Mainz
    Mainz, Rheinland Pfalz 55131, Germany
  • Universitaetsklinikum Leipzig AoeR
    Leipzig, Sachsen 4103, Germany
  • Klinikum rechts der Isar der TUM, HNO Klinik und Poliklinik
    Munich, 81675, Germany
  • Semmelweis Egyetem
    Budapest, 1088, Hungary
  • Azienda Socio Sanitaria Territoriale Fatebenefratelli (Presidio Ospedale Sacco)
    Milano, 20157, Italy
  • DAI di Medicina Interna, Immunologia Clinica, Patologia Clinica, Malattie Infettive
    Napoli, 80131, Italy
  • Azienda Ospedaliera Universitaria OO. RR. S. Giovanni di Dio e Ruggi D'Aragona
    Salerno, 84131, Italy
  • Hiroshima University Hospital
    Hiroshima, 734-8851, Japan
  • Kobe University Hospital
    Hyogo, 650-0017, Japan
  • Amsterdam UMC
    Amsterdam, 1105 AZ, Netherlands
  • Universitair Medisch Centrum Groningen
    Groningen, 9713 GZ, Netherlands
  • UMC Utrecht
    Utrecht, 3508 GA, Netherlands
  • NZOZ Homeo Medicus, Poradnia Alergologiczna
    Bialystok, 15-867, Poland
  • "ALL-MED" Specjalistyczna Opieka Medyczna Medyczny Instytut Badawczy
    Wroclaw, 53-201, Poland
  • Hospital Universitari de Bellvitge
    L'Hospitalet de Llobregat, Barcelona 8907, Spain
  • Complexo Hospitalario Universitario de Vigo
    Vigo, Pontevedra 36312, Spain
  • Hospital Universitario Cruces
    Barakaldo, Vizcaya 48903, Spain
  • Hospital Universitari Vall d'Hebron
    Barcelona, 8035, Spain
  • Hospital Universitario La Paz
    Madrid, 28046, Spain
  • Hospital Universitari i Politecnic La Fe
    Valencia, 46026, Spain
09

References and documents

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

Individual participant data

Plan to share: Yes — Takeda provides access to the de-identified individual participant data (IPD) for eligible studies to aid qualified researchers in addressing legitimate scientific objectives (Takeda's data sharing commitment is available on https://clinicaltrials.takeda.com/takedas-commitment?commitment=5). These IPDs will be provided in a secure research environment following approval of a data sharing request, and under the terms of a data sharing agreement.

Supporting information: Study protocol, Statistical analysis plan, Informed consent form, Clinical study report

Access criteria: IPD from eligible studies will be shared with qualified researchers according to the criteria and process described on https://vivli.org/ourmember/takeda/. For approved requests, the researchers will be provided access to anonymized data (to respect patient privacy in line with applicable laws and regulations) and with information necessary to address the research objectives under the terms of a data sharing agreement.

Data sharing details ↗ · vivli.org

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 27, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT04206605
Lead sponsor
Takeda
Collaborators
Takeda Development Center Americas, Inc.
Responsible party
Sponsor
First posted
Dec 20, 2019
Start date
May 4, 2020
Primary completion
Oct 20, 2022
Completion
Oct 20, 2022
Results posted
Dec 27, 2023
Last update
Dec 27, 2023

Study contacts

Study Director
study director · Takeda

Oversight

Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Dec 2023. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Studies of the drug tested here: Lanadelumab

Start the discussion