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CompletedNCT05217537Updated Mar 9, 2026Results posted

Study to Evaluate the PK of IV and PO Omadacycline in Children and Adolescents With Suspected or Confirmed Bacterial Infections

A Phase 1 interventional study of Omadacycline Injection [Nuzyra] and Omadacycline Oral Tablet in Bacterial Infections, sponsored by Paratek Pharmaceuticals Inc. Completed at 9 sites in United States. Open to participants aged 8 Years to 17 Years. Per ClinicalTrials.gov, last updated 2026-03-09.

Sponsored by Paratek Pharmaceuticals Inc · Phase 1, Interventional, and Other

Phase
Phase 1
Study type
Interventional
Enrollment
23
Allocation
Non-randomized
Ages
8 Years to 17 Years
Sex
All
01

Study summary

The purpose of this study is to evaluate the pharmacokinetics of a single dose of intravenous or oral omadacycline in children and adolescents with suspected or confirmed bacterial infections.

02

Conditions studied

  • Bacterial Infections

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03

Who can participate

Ages eligible
8 Years to 17 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Male or female subjects, age 8 to \< 18 (inclusive) who have written and signed parental/legal authorized representative (LAR) informed consent and pediatric assent.
  • Currently hospitalized with a suspected or confirmed bacterial infection and receiving or planned to receive systemic antibiotic therapy other than omadacycline.
  • Weight within the 5th and 95th percentile for age and sex.
  • Subjects must not be pregnant or nursing at the time of enrollment, and must agree to use a highly effective birth control method during the study

Exclusion criteria

Exclusion Criteria:

  • Evidence of a medical condition that may pose a safety risk or impair study participation.
  • Confirmed or suspected SARS-CoV-2 infection.
  • Has a history of hypersensitivity or allergic reaction to any tetracycline antibiotic.
  • Has received an investigational drug within the past 30 days.
04

Study design

Phase
Phase 1
Primary purpose
Other
Allocation
Non-randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
23 participants (actual)

Study arms

  • Experimental
    Cohort 1 (adolescents)

    12 to \< 18 years of age

    Drug: Omadacycline Injection [Nuzyra] · Drug: Omadacycline Oral Tablet

  • Experimental
    Cohort 2 (children)

    8 to \< 12 years of age

    Drug: Omadacycline Injection [Nuzyra] · Drug: Omadacycline Oral Tablet

Interventions

  • DrugOmadacycline Injection [Nuzyra]

    Single dose of 100 mg omadacycline IV in 100 mL of normal saline

    Also known as: NUZYRA

  • DrugOmadacycline Oral Tablet

    Single dose of 300 mg omadacycline PO (2 x 150 mg tablets)

    Also known as: NUZYRA

05

What researchers measure

Primary outcomes

  1. Area Under the Plasma Concentration Versus Time Curve (AUC) From Time 0 to 48hours (AUC0-48) of Omadacycline After IV Infusion

    Blood samples were collected and analyzed to determine the AUC(0-48). Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

    Time frame: Predose (At least 15 minutes prior to IV infusion), 10 minutes, 0.5, 1, 2, 8, 24 and 48 hours after the end of IV infusion

  2. AUC(0-48) of Omadacycline After Oral Administration

    Blood samples were collected and analyzed to determine the AUC0-48. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

    Time frame: Predose (At least 15 minutes prior to oral administration), 1, 2, 3, 8, 24 and 48 hours after dosing

  3. AUC From Time 0 to the Last Quantifiable Concentration (AUClast) of Omadacycline After IV Infusion

    Blood samples were collected and analyzed to determine the AUClast. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

    Time frame: Pre-dose (At least 15 minutes prior to IV infusion), and 0.5, 1, 2, 8, 24 and 48 hours after the end of IV infusion

  4. AUClast of Omadacycline After Oral Administration

    Blood samples were collected and analyzed to determine the AUClast. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

    Time frame: Predose (At least 15 minutes prior to oral administration), 1, 2, 3, 8, 24 and 48 hours after dosing

  5. AUC From Time 0 Extrapolated to Infinity (AUC0-inf) of Omadacycline After IV Infusion

    Blood samples were collected and analyzed to determine AUC0-inf. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

    Time frame: Predose (At least 15 minutes prior to IV infusion), 10 minutes, 0.5, 1, 2, 8, 24 and 48 hours after the end of IV infusion

  6. AUC0-inf of Omadacycline After Oral Administration

    Blood samples were collected and analyzed to determine AUC0-inf. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

    Time frame: Predose (At least 15 minutes prior to oral administration), 1, 2, 3, 8, 24 and 48 hours after dosing

  7. Maximum Observed Plasma Concentration (Cmax) of Omadacycline After IV Infusion

    Blood samples were collected and analyzed to determine Cmax. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

    Time frame: Predose (At least 15 minutes prior to IV infusion), 10 minutes, 0.5, 1, 2, 8, 24 and 48 hours after the end of IV infusion

  8. Cmax of Omadacycline After Oral Administration

    Blood samples were collected and analyzed to determine Cmax. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

    Time frame: Predose (At least 15 minutes prior to oral administration), 1, 2, 3, 8, 24 and 48 hours after dosing

  9. Time to Reach Maximum Observed Plasma Concentration (Tmax) of Omadacycline After IV Infusion

    Blood samples were collected and analyzed to determine Tmax. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

    Time frame: Predose (At least 15 minutes prior to IV infusion), 10 minutes, 0.5, 1, 2, 8, 24 and 48 hours after the end of IV infusion

  10. Tmax of Omadacycline After Oral Administration

    Blood samples were collected and analyzed to determine Tmax. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

    Time frame: Predose (At least 15 minutes prior to oral administration), 1, 2, 3, 8, 24 and 48 hours after dosing

  11. Elimination Half-life Associated With the Terminal Slope of the Semilogarithmic Concentration-time Curve (t1/2) of Omadacycline After IV Infusion

    Blood samples were collected and analyzed to determine t1/2 and was calculated by using formula. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

    Time frame: Predose (At least 15 minutes prior to IV infusion), 10 minutes, 0.5, 1, 2, 8, 24 and 48 hours after the end of IV infusion

  12. t1/2 of Omadacycline After Oral Administration

    Blood samples were collected and analyzed to determine t1/2. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

    Time frame: Predose (At least 15 minutes prior to oral administration), 1, 2, 3, 8, 24 and 48 hours after dosing

  13. Apparent Volume of Distribution During the Terminal Phase (Vz) of Omadacycline After IV Infusion

    Blood samples were collected and analyzed to determine Vz. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

    Time frame: Predose (At least 15 minutes prior to IV infusion), 10 minutes, 0.5, 1, 2, 8, 24 and 48 hours after the end of IV infusion

  14. Systemic Clearance (CL) of Omadacycline After IV Infusion

    Blood samples were collected and analyzed to determine CL. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

    Time frame: Predose (At least 15 minutes prior to IV infusion), 10 minutes, 0.5, 1, 2, 8, 24 and 48 hours after the end of IV infusion

Secondary outcomes

  1. Number of Participants Reporting Treatment-emergent Adverse Events (TEAEs), by Relationship to the Study Drug.

    An adverse event (AE) was any untoward medical occurrence associated with the use of a drug in humans, whether or not considered drug related. A TEAE was any event that had not been present before exposure to the study drug, or any event that had already been present but worsened in intensity or frequency after exposure.

    Time frame: Up to Day 7

  2. Number of Participants Reporting TEAE by Severity

    An adverse event (AE) was any untoward medical occurrence associated with the use of a drug in humans, whether or not considered drug related. A TEAE was any event that had not been present before exposure to the study drug, or any event that had already been present but worsened in intensity or frequency after exposure.

    Time frame: Up to Day 7

  3. Number of Participants Reporting TEAE, Serious Adverse Events (SAEs) and AE Leading to Discontinuation of Study Drug

    An AE was any untoward medical occurrence associated with the use of a drug in humans, whether or not considered drug related. A TEAE was any event that had not been present before exposure to the study drug, or any event that had already been present but worsened in intensity or frequency after exposure. An SAE was any adverse event that resulted in death, required hospitalization, persistent or significant disability, congenital anomaly.

    Time frame: Up to Day 7

  4. Number of Participants With Change From Baseline in Hematology Parameters

    Blood samples were collected for the assessment of complete blood count (CBC) including hemoglobin, hematocrit, leukocytes, platelets, mean cell volume, platelet count, white blood cell counts, and differential to include the absolute counts for neutrophils, lymphocytes, eosinophils, monocytes and basophils.

    Time frame: Up to Day 2

  5. Number of Participants With Change From Baseline in Serum Chemistry Parameters

    Blood samples were collected for the assessment of blood glucose, urea, creatinine, sodium, potassium, chloride, bicarbonate, alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (AP), total bilirubin, total protein, albumin, creatine phosphokinase (CK), calcium, phosphate, cholesterol, urate, amylase, lipase and gamma-glutamyl transpeptidase (GGT).

    Time frame: Up to Day 2

  6. Number of Participants With Change From Baseline in Vital Signs

    Vital signs included blood pressure, heart rate, and oral body temperature and were collected at the specified timepoints. Vital signs were measured after participants had remained in a supine position for at least 5 minutes using an automated calibrated device.

    Time frame: Up to Day 2

  7. Number of Participants With Clinically Significant Changes in Physical Examination

    A comprehensive physical examination was conducted, encompassing general appearance, skin, neck, eyes, ears, nose, throat, lungs, heart, abdomen, lymph nodes, extremities, and brief neurological exam.

    Time frame: Up to Day 2

06

Results

Posted Mar 9, 2026

Participant flow

This was an open-label, multi-center study in children and adolescent participants with suspected or confirmed bacterial infections who had received concomitant systemic antibacterial therapy. The study consisted of 2 age cohorts: Cohort 1 (adolescents): 12 to \< 18 years of age and Cohort 2 (children): 8 to \< 12 years of age

Participant flow — Overall Study
MilestoneAdolescents, Cohort 1: 100 mg IV OmadacyclineAdolescents, Cohort 1: 300 mg Oral OmadacyclineChildren, Cohort 2: 100 mg IV OmadacyclineChildren, Cohort 2: 300 mg Oral Omadacycline
Started6764
Completed6764
Not completed0000

Outcome measures

PrimaryArea Under the Plasma Concentration Versus Time Curve (AUC) From Time 0 to 48hours (AUC0-48) of Omadacycline After IV Infusion

Blood samples were collected and analyzed to determine the AUC(0-48). Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

Time frame:
Predose (At least 15 minutes prior to IV infusion), 10 minutes, 0.5, 1, 2, 8, 24 and 48 hours after the end of IV infusion
Reported as:
Geometric mean · hours*nanograms per milliliter (h*ng/ml)
Area Under the Plasma Concentration Versus Time Curve (AUC) From Time 0 to 48hours (AUC0-48) of Omadacycline After IV Infusion
hours*nanograms per milliliter (h*ng/ml)Adolescents, Cohort 1: 100 mg IV OmadacyclineChildren, Cohort 2: 100 mg IV Omadacycline
Area Under the Plasma Concentration Versus Time Curve (AUC) From Time 0 to 48hours (AUC0-48) of Omadacycline After IV Infusion8990 ± 27.313300 ± 40.1
PrimaryAUC(0-48) of Omadacycline After Oral Administration

Blood samples were collected and analyzed to determine the AUC0-48. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

Time frame:
Predose (At least 15 minutes prior to oral administration), 1, 2, 3, 8, 24 and 48 hours after dosing
Reported as:
Geometric mean · h*ng/ml
AUC(0-48) of Omadacycline After Oral Administration
h*ng/mlAdolescents, Cohort 1: 300 mg Oral OmadacyclineChildren, Cohort 2: 300 mg Oral Omadacycline
AUC(0-48) of Omadacycline After Oral Administration6860 ± 81.517900 ± NA
PrimaryAUC From Time 0 to the Last Quantifiable Concentration (AUClast) of Omadacycline After IV Infusion

Blood samples were collected and analyzed to determine the AUClast. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

Time frame:
Pre-dose (At least 15 minutes prior to IV infusion), and 0.5, 1, 2, 8, 24 and 48 hours after the end of IV infusion
Reported as:
Geometric mean · h*ng/ml
AUC From Time 0 to the Last Quantifiable Concentration (AUClast) of Omadacycline After IV Infusion
h*ng/mlAdolescents, Cohort 1: 100 mg IV OmadacyclineChildren, Cohort 2: 100 mg IV Omadacycline
AUC From Time 0 to the Last Quantifiable Concentration (AUClast) of Omadacycline After IV Infusion9010 ± 27.413300 ± 40.2
PrimaryAUClast of Omadacycline After Oral Administration

Blood samples were collected and analyzed to determine the AUClast. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

Time frame:
Predose (At least 15 minutes prior to oral administration), 1, 2, 3, 8, 24 and 48 hours after dosing
Reported as:
Geometric mean · h*ng/ml
AUClast of Omadacycline After Oral Administration
h*ng/mlAdolescents, Cohort 1: 300 mg Oral OmadacyclineChildren, Cohort 2: 300 mg Oral Omadacycline
AUClast of Omadacycline After Oral Administration6550 ± 91.69860 ± 84.9
PrimaryAUC From Time 0 Extrapolated to Infinity (AUC0-inf) of Omadacycline After IV Infusion

Blood samples were collected and analyzed to determine AUC0-inf. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

Time frame:
Predose (At least 15 minutes prior to IV infusion), 10 minutes, 0.5, 1, 2, 8, 24 and 48 hours after the end of IV infusion
Reported as:
Geometric mean · h*ng/ml
AUC From Time 0 Extrapolated to Infinity (AUC0-inf) of Omadacycline After IV Infusion
h*ng/mlAdolescents, Cohort 1: 100 mg IV OmadacyclineChildren, Cohort 2: 100 mg IV Omadacycline
AUC From Time 0 Extrapolated to Infinity (AUC0-inf) of Omadacycline After IV Infusion9720 ± 28.114100 ± 38.5
PrimaryAUC0-inf of Omadacycline After Oral Administration

Blood samples were collected and analyzed to determine AUC0-inf. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

Time frame:
Predose (At least 15 minutes prior to oral administration), 1, 2, 3, 8, 24 and 48 hours after dosing
Reported as:
Geometric mean · h*ng/ml
AUC0-inf of Omadacycline After Oral Administration
h*ng/mlAdolescents, Cohort 1: 300 mg Oral OmadacyclineChildren, Cohort 2: 300 mg Oral Omadacycline
AUC0-inf of Omadacycline After Oral Administration7450 ± 86.918600 ± NA
PrimaryMaximum Observed Plasma Concentration (Cmax) of Omadacycline After IV Infusion

Blood samples were collected and analyzed to determine Cmax. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

Time frame:
Predose (At least 15 minutes prior to IV infusion), 10 minutes, 0.5, 1, 2, 8, 24 and 48 hours after the end of IV infusion
Reported as:
Geometric mean · nanograms/milliliter (ng/ml)
Maximum Observed Plasma Concentration (Cmax) of Omadacycline After IV Infusion
nanograms/milliliter (ng/ml)Adolescents, Cohort 1: 100 mg IV OmadacyclineChildren, Cohort 2: 100 mg IV Omadacycline
Maximum Observed Plasma Concentration (Cmax) of Omadacycline After IV Infusion1270 ± 29.11600 ± 51.6
PrimaryCmax of Omadacycline After Oral Administration

Blood samples were collected and analyzed to determine Cmax. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

Time frame:
Predose (At least 15 minutes prior to oral administration), 1, 2, 3, 8, 24 and 48 hours after dosing
Reported as:
Geometric mean · ng/ml
Cmax of Omadacycline After Oral Administration
ng/mlAdolescents, Cohort 1: 300 mg Oral OmadacyclineChildren, Cohort 2: 300 mg Oral Omadacycline
Cmax of Omadacycline After Oral Administration528 ± 69.4946 ± 42.7
PrimaryTime to Reach Maximum Observed Plasma Concentration (Tmax) of Omadacycline After IV Infusion

Blood samples were collected and analyzed to determine Tmax. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

Time frame:
Predose (At least 15 minutes prior to IV infusion), 10 minutes, 0.5, 1, 2, 8, 24 and 48 hours after the end of IV infusion
Reported as:
Median · hours
Time to Reach Maximum Observed Plasma Concentration (Tmax) of Omadacycline After IV Infusion
hoursAdolescents, Cohort 1: 100 mg IV OmadacyclineChildren, Cohort 2: 100 mg IV Omadacycline
Time to Reach Maximum Observed Plasma Concentration (Tmax) of Omadacycline After IV Infusion0.66 (0.58 to 0.73)0.81 (0.73 to 1.08)
PrimaryTmax of Omadacycline After Oral Administration

Blood samples were collected and analyzed to determine Tmax. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

Time frame:
Predose (At least 15 minutes prior to oral administration), 1, 2, 3, 8, 24 and 48 hours after dosing
Reported as:
Median · hours
Tmax of Omadacycline After Oral Administration
hoursAdolescents, Cohort 1: 300 mg Oral OmadacyclineChildren, Cohort 2: 300 mg Oral Omadacycline
Tmax of Omadacycline After Oral Administration2.98 (2.00 to 3.13)2.00 (1.03 to 3.00)
PrimaryElimination Half-life Associated With the Terminal Slope of the Semilogarithmic Concentration-time Curve (t1/2) of Omadacycline After IV Infusion

Blood samples were collected and analyzed to determine t1/2 and was calculated by using formula. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

Time frame:
Predose (At least 15 minutes prior to IV infusion), 10 minutes, 0.5, 1, 2, 8, 24 and 48 hours after the end of IV infusion
Reported as:
Geometric mean · hours
Elimination Half-life Associated With the Terminal Slope of the Semilogarithmic Concentration-time Curve (t1/2) of Omadacycline After IV Infusion
hoursAdolescents, Cohort 1: 100 mg IV OmadacyclineChildren, Cohort 2: 100 mg IV Omadacycline
Elimination Half-life Associated With the Terminal Slope of the Semilogarithmic Concentration-time Curve (t1/2) of Omadacycline After IV Infusion12.9 ± 13.511.9 ± 11.8
Primaryt1/2 of Omadacycline After Oral Administration

Blood samples were collected and analyzed to determine t1/2. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

Time frame:
Predose (At least 15 minutes prior to oral administration), 1, 2, 3, 8, 24 and 48 hours after dosing
Reported as:
Geometric mean · hours
t1/2 of Omadacycline After Oral Administration
hoursAdolescents, Cohort 1: 300 mg Oral OmadacyclineChildren, Cohort 2: 300 mg Oral Omadacycline
t1/2 of Omadacycline After Oral Administration12.7 ± 31.210.7 ± NA
PrimaryApparent Volume of Distribution During the Terminal Phase (Vz) of Omadacycline After IV Infusion

Blood samples were collected and analyzed to determine Vz. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

Time frame:
Predose (At least 15 minutes prior to IV infusion), 10 minutes, 0.5, 1, 2, 8, 24 and 48 hours after the end of IV infusion
Reported as:
Geometric mean · liters
Apparent Volume of Distribution During the Terminal Phase (Vz) of Omadacycline After IV Infusion
litersAdolescents, Cohort 1: 100 mg IV OmadacyclineChildren, Cohort 2: 100 mg IV Omadacycline
Apparent Volume of Distribution During the Terminal Phase (Vz) of Omadacycline After IV Infusion191 ± 27.7122 ± 48.0
PrimarySystemic Clearance (CL) of Omadacycline After IV Infusion

Blood samples were collected and analyzed to determine CL. Pharmacokinetic parameters were estimated using non-compartmental methods and actual time data.

Time frame:
Predose (At least 15 minutes prior to IV infusion), 10 minutes, 0.5, 1, 2, 8, 24 and 48 hours after the end of IV infusion
Reported as:
Geometric mean · Liters per hour (L/h)
Systemic Clearance (CL) of Omadacycline After IV Infusion
Liters per hour (L/h)Adolescents, Cohort 1: 100 mg IV OmadacyclineChildren, Cohort 2: 100 mg IV Omadacycline
Systemic Clearance (CL) of Omadacycline After IV Infusion10.3 ± 28.17.10 ± 38.5
SecondaryNumber of Participants Reporting Treatment-emergent Adverse Events (TEAEs), by Relationship to the Study Drug.

An adverse event (AE) was any untoward medical occurrence associated with the use of a drug in humans, whether or not considered drug related. A TEAE was any event that had not been present before exposure to the study drug, or any event that had already been present but worsened in intensity or frequency after exposure.

Time frame:
Up to Day 7
Reported as:
Count of participants · Participants
Number of Participants Reporting Treatment-emergent Adverse Events (TEAEs), by Relationship to the Study Drug.
ParticipantsAdolescents, Cohort 1: 100 mg IV OmadacyclineAdolescents, Cohort 1: 300 mg Oral OmadacyclineChildren, Cohort 2: 100 mg IV OmadacyclineChildren, Cohort 2: 300 mg Oral Omadacycline
Not Related0211
Related3232
SecondaryNumber of Participants Reporting TEAE by Severity

An adverse event (AE) was any untoward medical occurrence associated with the use of a drug in humans, whether or not considered drug related. A TEAE was any event that had not been present before exposure to the study drug, or any event that had already been present but worsened in intensity or frequency after exposure.

Time frame:
Up to Day 7
Reported as:
Count of participants · Participants
Number of Participants Reporting TEAE by Severity
ParticipantsAdolescents, Cohort 1: 100 mg IV OmadacyclineAdolescents, Cohort 1: 300 mg Oral OmadacyclineChildren, Cohort 2: 100 mg IV OmadacyclineChildren, Cohort 2: 300 mg Oral Omadacycline
Mild2440
Moderate1003
Severe0000
SecondaryNumber of Participants Reporting TEAE, Serious Adverse Events (SAEs) and AE Leading to Discontinuation of Study Drug

An AE was any untoward medical occurrence associated with the use of a drug in humans, whether or not considered drug related. A TEAE was any event that had not been present before exposure to the study drug, or any event that had already been present but worsened in intensity or frequency after exposure. An SAE was any adverse event that resulted in death, required hospitalization, persistent or significant disability, congenital anomaly.

Time frame:
Up to Day 7
Reported as:
Number · participants
Number of Participants Reporting TEAE, Serious Adverse Events (SAEs) and AE Leading to Discontinuation of Study Drug
participantsAdolescents, Cohort 1: 100 mg IV OmadacyclineAdolescents, Cohort 1: 300 mg Oral OmadacyclineChildren, Cohort 2: 100 mg IV OmadacyclineChildren, Cohort 2: 300 mg Oral Omadacycline
Any TEAE3443
Any SAE0000
AE leading to discontinuation0000
SecondaryNumber of Participants With Change From Baseline in Hematology Parameters

Blood samples were collected for the assessment of complete blood count (CBC) including hemoglobin, hematocrit, leukocytes, platelets, mean cell volume, platelet count, white blood cell counts, and differential to include the absolute counts for neutrophils, lymphocytes, eosinophils, monocytes and basophils.

Time frame:
Up to Day 2
Reported as:
Count of participants · Participants
Number of Participants With Change From Baseline in Hematology Parameters
ParticipantsAdolescents, Cohort 1: 100 mg IV OmadacyclineAdolescents, Cohort 1: 300 mg Oral OmadacyclineChildren, Cohort 2: 100 mg IV OmadacyclineChildren, Cohort 2: 300 mg Oral Omadacycline
Hematocrit2000
Hemoglobin3000
Leukocytes0110
Platelets0010
Mean cell volume0000
Platelet count0000
White blood cell counts0000
Neutrophils0000
Lymphocytes0000
Eosinophils0000
Monocytes0000
Basophils0000
SecondaryNumber of Participants With Change From Baseline in Serum Chemistry Parameters

Blood samples were collected for the assessment of blood glucose, urea, creatinine, sodium, potassium, chloride, bicarbonate, alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (AP), total bilirubin, total protein, albumin, creatine phosphokinase (CK), calcium, phosphate, cholesterol, urate, amylase, lipase and gamma-glutamyl transpeptidase (GGT).

Time frame:
Up to Day 2
Reported as:
Count of participants · Participants
Number of Participants With Change From Baseline in Serum Chemistry Parameters
ParticipantsAdolescents, Cohort 1: 100 mg IV OmadacyclineAdolescents, Cohort 1: 300 mg Oral OmadacyclineChildren, Cohort 2: 100 mg IV OmadacyclineChildren, Cohort 2: 300 mg Oral Omadacycline
Amylase1000
Lipase1010
ALT0031
AST0031
Bicarbonate0010
Potassium0020
Urate0010
Blood glucose0000
Urea0000
Creatinine0000
Sodium0000
Chloride0000
AP0000
Total bilirubin0000
Total protein0000
Albumin0000
CK0000
Calcium0000
Phosphate0000
Cholesterol0000
GGT0000
SecondaryNumber of Participants With Change From Baseline in Vital Signs

Vital signs included blood pressure, heart rate, and oral body temperature and were collected at the specified timepoints. Vital signs were measured after participants had remained in a supine position for at least 5 minutes using an automated calibrated device.

Time frame:
Up to Day 2
Reported as:
Count of participants · Participants
Number of Participants With Change From Baseline in Vital Signs
ParticipantsAdolescents, Cohort 1: 100 mg IV OmadacyclineAdolescents, Cohort 1: 300 mg Oral OmadacyclineChildren, Cohort 2: 100 mg IV OmadacyclineChildren, Cohort 2: 300 mg Oral Omadacycline
Blood pressure1000
Heart rate0000
Oral body temperature0000
SecondaryNumber of Participants With Clinically Significant Changes in Physical Examination

A comprehensive physical examination was conducted, encompassing general appearance, skin, neck, eyes, ears, nose, throat, lungs, heart, abdomen, lymph nodes, extremities, and brief neurological exam.

Time frame:
Up to Day 2
Reported as:
Count of participants · Participants
Number of Participants With Clinically Significant Changes in Physical Examination
ParticipantsAdolescents, Cohort 1: 100 mg IV OmadacyclineAdolescents, Cohort 1: 300 mg Oral OmadacyclineChildren, Cohort 2: 100 mg IV OmadacyclineChildren, Cohort 2: 300 mg Oral Omadacycline
Number of Participants With Clinically Significant Changes in Physical Examination0000

Adverse events

Collected over Up to Day 7. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Adolescents, Cohort 1: 100 mg IV Omadacycline0/6 (0%)0/6 (0%)3/6 (50%)
Adolescents, Cohort 1: 300 mg Oral Omadacycline0/7 (0%)0/7 (0%)4/7 (57.1%)
Cohort 2 Children 100 mg IV Omadacycline0/6 (0%)0/6 (0%)4/6 (66.7%)
Cohort 2 Children 300 mg Oral Omadacycline0/4 (0%)0/4 (0%)3/4 (75%)
Most frequent other events
Showing 10 of 23
Most frequent other events
EventAdolescents, Cohort 1: 100 mg IV OmadacyclineAdolescents, Cohort 1: 300 mg Oral OmadacyclineCohort 2 Children 100 mg IV OmadacyclineCohort 2 Children 300 mg Oral Omadacycline
VomitingGastrointestinal disorders0/61/71/62/4
NauseaGastrointestinal disorders0/61/71/61/4
RashSkin and subcutaneous tissue disorders1/60/70/61/4
Hepatic enzyme increasedInvestigations0/60/70/61/4
Musculoskeletal chest painMusculoskeletal and connective tissue disorders0/60/70/61/4
Yellow SkinSkin and subcutaneous tissue disorders0/60/70/61/4
Acute respiratory failureRespiratory, thoracic and mediastinal disorders0/60/70/61/4
ConstipationGastrointestinal disorders1/60/71/60/4
Infusion site painGeneral disorders1/60/70/60/4
Infusion site pruritusGeneral disorders1/60/70/60/4

Baseline characteristics

Safety Analysis Population includes all participants who have received at least one dose of study drug.

Age, Continuous
Age, Continuous(years)Adolescents, Cohort 1: 100 mg IV OmadacyclineAdolescents, Cohort 1: 300 mg Oral OmadacyclineChildren, Cohort 2: 100 mg IV OmadacyclineChildren, Cohort 2: 300 mg Oral OmadacyclineTotal
Mean14.7 ± 0.8215.1 ± 1.469.5 ± 1.3810.5 ± 1.0012.7 ± 2.81
Sex: Female, Male
Sex: Female, Male(Participants)Adolescents, Cohort 1: 100 mg IV OmadacyclineAdolescents, Cohort 1: 300 mg Oral OmadacyclineChildren, Cohort 2: 100 mg IV OmadacyclineChildren, Cohort 2: 300 mg Oral OmadacyclineTotal
Female21418
Male462315
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)Adolescents, Cohort 1: 100 mg IV OmadacyclineAdolescents, Cohort 1: 300 mg Oral OmadacyclineChildren, Cohort 2: 100 mg IV OmadacyclineChildren, Cohort 2: 300 mg Oral OmadacyclineTotal
Hispanic or Latino32218
Not Hispanic or Latino354315
Unknown or Not Reported00000
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Adolescents, Cohort 1: 100 mg IV OmadacyclineAdolescents, Cohort 1: 300 mg Oral OmadacyclineChildren, Cohort 2: 100 mg IV OmadacyclineChildren, Cohort 2: 300 mg Oral OmadacyclineTotal
American Indian or Alaska Native10102
Asian00000
Native Hawaiian or Other Pacific Islander00000
Black or African American12216
White333211
More than one race00000
Unknown or Not Reported12014
07

Study locations

9 sites
  • Site 109
    Little Rock, Arkansas 72202, United States
  • Site 112
    Long Beach, California 90806, United States
  • Site 107
    Orange, California 92868, United States
  • Site 114
    Aurora, Colorado 80045, United States
  • Site 105
    Chicago, Illinois 60611, United States
  • Site 111
    Greenville, North Carolina 27858, United States
  • Site 106
    Cleveland, Ohio 60611, United States
  • Site 113
    Philadelphia, Pennsylvania 19104, United States
  • Site 108
    Houston, Texas 77030, United States
08

References and documents

Study documents

  • Study protocol · Sep 14, 2023
  • Statistical analysis plan · Jan 9, 2023

Documents are hosted by the registry — open the source record to download them.

Individual participant data

Plan to share: No

09

Registry details

Key details

Study ID
NCT05217537
Lead sponsor
Paratek Pharmaceuticals Inc
Responsible party
Sponsor
First posted
Feb 1, 2022
Start date
Apr 6, 2022
Primary completion
Feb 27, 2025
Completion
Feb 27, 2025
Results posted
Mar 9, 2026
Last update
Mar 9, 2026

Study contacts

Amy Manley
study director · Paratek Pharmaceuticals Inc

Oversight

Data monitoring committee
No
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 Feb 2026. You cannot join it, but the record below documents what was studied.

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