ClinicalTrials.gg
CompletedNCT03845140Updated Mar 21, 2024Results posted

L-PZQ ODT in Schistosoma Infected Children

A Phase 3 interventional study of L-PZQ ODT 50 mg/kg and Biltricide® in Schistosomiasis, sponsored by Merck KGaA, Darmstadt, Germany. Completed at 2 sites in 2 countries. Open to participants aged 3 Months to 6 Years. Per ClinicalTrials.gov, last updated 2024-03-21.

Sponsored by Merck KGaA, Darmstadt, Germany · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
288
Allocation
Randomized
Ages
3 Months to 6 Years
Sex
All
01

Study summary

The study would evaluate the safety and efficacy of L-praziquantel orodispersible (L-PZQ ODT) tablets in Schistosoma infected children aged 3 months to 6 years.

02

Conditions studied

  • Schistosomiasis

Browse trials for

Keywords

  • Schistosomiasis
  • Children
  • L-praziquantel
  • Biltricide®
03

In context

Schistosomiasis

79 studies on the registry are indexed under Schistosomiasis; 14 are open to participants now.

This study's enrollment of 288 is close to the median of 289 across 52 interventional studies indexed under Schistosomiasis.

Browse Schistosomiasis studies →

Lead sponsor

Merck KGaA, Darmstadt, Germany is the lead sponsor of 275 studies on the registry; none are open to participants now.

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

04

Who can participate

Ages eligible
3 Months to 6 Years
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

  • Age of the participant is 4 to 6 years of age (Cohorts 1 and 4), 2 to 3 years of age (Cohorts 2 and 4) 3 to less than 24 months of age (Cohorts 3 and 4)
  • Participants are; Schistosoma (S.) mansoni positive (Cohorts 1, 2, and 3); diagnosis defined as positive egg counts in stool greater than or equal to ( >=) 1 egg per 1 occasion) according to World Health Organization (WHO) classification [1]: light (1 to 99 eggs per gram of feces), moderate (100 to 399 eggs per gram of feces) and heavy (>= 400 eggs per gram of feces) infections; S. haematobium positive (Cohort 4); diagnosis defined as positive egg counts in urine (>= 1 egg per 10 milliliter(mL) urine) according to WHO classification (Prevention and Control of Schistosomiasis and Soil Transmitted Helminthiasis. WHO Technical Report Series No. 912. WHO, Geneva, Switzerland, 2002).light (less than (\<) 50 eggs per 10 mL of urine) and heavy (>=50 eggs per 10 mL of urine) infections
  • Participants have a minimum body weight of 8.0 Kilograms (Kg) in 2 to 6 years of age children and 5.0 Kg in 3 months to \< 24 months of age infants and toddlers
  • Parent's or guardian/legally authorized representative's ability to communicate well with the Investigator and his/her delegate, to understand the protocol requirements and restrictions, and to be willing to have their children comply with the requirements of the entire study, that is:

    • To be examined by a study physician at screening and 17 to 21 days after treatment
    • To provide stool samples at screening and 17 to 21 days after treatment
    • To provide urine samples at screening and 17 to 21 days after treatment
    • To provide venous blood samples for laboratory assessments
    • To be housed in the clinic for 12 to 24 hours
    • To provide venous blood samples for pharmacokinetics (PK) assessments (for participants in the PK subset)
  • Participants have a minimum level of 10 gram per deciliter

Exclusion criteria

Exclusion Criteria:

  • Participants with following medical conditions are excluded from the study; Findings in the clinical examination and/or laboratory safety examination on the treatment day, that in the opinion of the Investigator constitute a risk or a for the child's participation in the study or that could interfere with the study objectives, conduct or evaluation. This includes but is not restricted to bacterial or viral infections, such as dysentery, gastroenteritis, ascites, jaundice, etc.; Participants with seizures and/or medical history of seizures and/or other signs of potential central nervous system involvement; Participants with known cysticercosis, or with signs or symptoms (for example: subcutaneous nodules) suggestive of cysticercosis; Participants with an acute infection or other acute illness within the 7 days prior to study screening; Debilitating illness such as tuberculosis, malnutrition, etc.
  • Treatment with PZQ within the 4 weeks prior to the study screening
  • Concomitant treatment (within 2 weeks prior to enrollment) with medication that might affect the metabolism of PZQ, such as certain anti epileptics (for example: carbamazepine or phenytoin), glucocorticosteroids (for example: dexamethasone), chloroquine, rifampicin or cimetidine (see Biltricide® Summary of Product Characteristics [SmPC])
  • Treatment within the 2 weeks prior to the study screening with anti malarial medications
  • For infants and toddlers being breast fed, treatment of the mothers/wet nurses with PZQ in the 3 days prior to PZQ ODT administration
  • Participation in any clinical study within 4 weeks prior to administration of PZQ ODT, or anticipated at any time until completion of the End of study visit
  • Participants with marked increases of the liver enzymes: and/or aspartate aminotransferase above 3 times the (ULN); total level above 1.5 times the ULN
  • Participants with hepatosplenic schistosomiasis
  • Fever, defined as temperature above 37.5 degree Celsius axillary or oral mixed S. haematobium and S. mansoni infections
Terms in these criteria, in plain language(5)

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.

Hemoglobin (Hb)

The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

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.

05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
288 participants (actual)

Study arms

  • Experimental
    Cohort 1a: 4 to 6 years L-PZQ ODT 50 mg/kg

    Participants aged 4 to 6 years infected with Schistosoma (S.) mansoni received Levorotatory enantiomer of praziquantel (L-PZQ) orodispersible tablets (ODT) (150 milligrams \[mg\]) orally at a dose of 50 milligram per kilogram (mg/Kg) as a single oral dose after food-intake on Day 1.

    Drug: L-PZQ ODT 50 mg/kg

  • Active comparator
    Cohort 1b: 4 to 6 years Biltricide® 40 mg/kg

    Participants aged 4 to 6 years infected with S. mansoni received Racemate Praziquantel tablets (Biltricide®) (600 mg) orally at a dose of 40 mg/kg as a single oral dose after food-intake on Day 1.

    Drug: Biltricide®

  • Experimental
    Cohort 2: 2 to 3 years L-PZQ ODT 50 mg/kg

    Participants aged 2 to 3 years infected with S. mansoni received L-PZQ ODT (150 mg) tablet orally at a dose of 50 mg/kg as a single oral dose after food-intake on Day 1.

    Drug: L-PZQ ODT 50 mg/kg

  • Experimental
    Cohort 3: 3 to 24 months L-PZQ ODT 50 mg/kg

    Participants aged 3 to 24 months infected with S. mansoni received L-PZQ ODT (150 mg) tablet orally at a dose of 50 mg/kg as a single oral dose after food-intake on Day 1.

    Drug: L-PZQ ODT 50 mg/kg

  • Experimental
    Cohort 4a: 3 months to 6 years L-PZQ ODT 50 mg/kg

    Participants aged 3 months to 6 years infected with S. haematobium received L-PZQ ODT (150 mg) tablet orally at a dose of 50 mg/kg as a single oral dose after food-intake on Day 1.

    Drug: L-PZQ ODT 50 mg/kg

  • Experimental
    Cohort 4b: 3 months to 6 years L-PZQ ODT 60 mg/kg

    Participants aged 3 months to 6 years infected with S. haematobium received L-PZQ ODT (150 mg) tablet orally at a dose of 60 mg/kg as a single oral dose after food-intake on Day 1.

    Drug: L-PZQ ODT 60 mg/kg

Interventions

  • DrugL-PZQ ODT 50 mg/kg

    Participants received single oral dose of L-PZQ ODT 50 mg/Kg on Day 1.

  • Participants received single oral dose of Biltricide® 40 mg/kg on Day 1.

  • DrugL-PZQ ODT 60 mg/kg

    Participant received single oral dose of L-PZQ ODT 60 mg/kg on Day 1.

06

What researchers measure

Primary outcomes

  1. Cohort 1a and Cohort 1b: Number of Participants With Clinical Cure Determined by Kato-Katz Method

    Clinical cure was defined as no parasite egg in the stool at Week 3 as determined by the Kato-Katz method. Number of participants with clinical cure were reported.

    Time frame: at Week 3

Secondary outcomes

  1. Cohort 2 and Cohort 3: Number of Participants With Clinical Cure Determined by Kato-Katz Method

    Clinical cure was defined as no parasite egg in the stool at Week 3 as determined by the Kato-Katz method. Number of participants with clinical cure were reported.

    Time frame: at Week 3

  2. Cohort 4a and Cohort 4b: Number of Participants With Clinical Cure Determined by Urine Filtration Technique

    Clinical cure was defined as no parasite egg in the urine samples at follow up as determined by the urine filtration technique. Number of participants with clinical cure were reported.

    Time frame: Week 3 and Week 5

  3. Cohort 1a, Cohort 1b, Cohort 2 and Cohort 3: Egg Reduction Rate (Percent [%]) Determined by Kato-Katz Method

    Percentage of reduction in group mean egg count was calculated as relative difference between the post-treatment arithmetic mean egg count and pre-treatment arithmetic mean egg count at baseline count, (pre-treatment mean egg count minus post-treatment mean egg count divided by pre-treatment mean egg count) \*100. Egg counts were determined by the Kato-Katz method.

    Time frame: Pre-treatment, Week 3 post-treatment

  4. Cohort 4a and Cohort 4b: Egg Reduction Rate (Percent [%]) Determined by Urine Filtration Technique

    Percentage of reduction in group mean egg count was calculated as relative difference between the post-treatment arithmetic mean egg count and pre-treatment arithmetic mean egg count at baseline count, (pre-treatment mean egg count minus post-treatment mean egg count divided by pre-treatment mean egg count) \*100. Egg counts were determined by the urine filtration technique.

    Time frame: Pre-treatment, Weeks 3 and 5 post-treatment

  5. Cohort 1a, Cohort 1b, Cohort 2, and Cohort 3: Number of Participants With Clinical Cure Determined by Point-of-Care Circulating Cathodic Antigen (POC-CCA) Test

    Clinical cure is defined as absence of test line in the POC-CCA test cassette (that is no Schistosoma antigens detected). Number of participants with clinical cure were reported.

    Time frame: at Week 3

  6. Number of Participants With Treatment-emergent Adverse Events (TEAEs), Serious TEAEs and Treatment-Related TEAEs

    Adverse Event (AE) was defined any untoward medical occurrence in a participant administered with a study drug, which does not necessarily had a causal relationship with this treatment. Serious AE was defined AE that resulted in any of the following outcomes: death; life threatening; persistent/significant disability/incapacity; initial/prolonged inpatient hospitalization; congenital anomaly/birth defect. TEAEs: TEAEs were defined as those events with onset dates/time occurring after study intervention administration or events that worsen after study intervention administration. TEAEs included serious TEAEs and non-serious TEAEs. Treatment-related TEAEs: reasonably related to the study intervention.

    Time frame: up to Day 40

  7. Number of Participants With Treatment Emergent Adverse Events (TEAEs) by Severity According to Qualitative Toxicity Scale

    Severity of TEAEs were graded using Qualitative Toxicity Scale, as follows: Mild: Participant is aware of the event or symptom, but the event or symptom is easily tolerated; Moderate: Participant experiences sufficient discomfort to interfere with or reduce his or her usual level of activity; Severe: Significant impairment of functioning: the participant is unable to carry out his or her usual activities. Number of participants with TEAEs by severity were reported.

    Time frame: up to Day 40

  8. Change From Baseline in Hematology Parameter: Erythrocytes Mean Corpuscular Hemoglobin

    Blood samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the hematology parameter: erythrocytes mean corpuscular hemoglobin. Change from baseline in hematology parameter: erythrocytes mean corpuscular hemoglobin at Day 1 were reported.

    Time frame: Baseline, Day 1

  9. Change From Baseline in Hematology Parameters: Erythrocytes Mean Corpuscular Hemoglobin (HGB) Concentration and Hemoglobin

    Blood samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the hematology parameters: erythrocytes mean corpuscular HGB concentration and hemoglobin. Change from baseline in hematology parameters: erythrocytes mean corpuscular HGB concentration and hemoglobin at Day 1 were reported.

    Time frame: Baseline, Day 1

  10. Change From Baseline in Hematology Parameter: Erythrocytes Mean Corpuscular Volume

    Blood samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the hematology parameter: erythrocytes mean corpuscular volume. Change from baseline in hematology parameter: erythrocytes mean corpuscular volume at Day 1 were reported.

    Time frame: Baseline, Day 1

  11. Change From Baseline in Hematology Parameter: Erythrocytes

    Blood samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the hematology parameter: erythrocytes. Change from baseline in hematology parameter: erythrocytes at Day 1 were reported.

    Time frame: Baseline, Day 1

  12. Change From Baseline in Hematology Parameters: Hematocrit, Lymphocytes/Leukocytes, Mixed Cells/Leukocytes, Neutrophils/Leukocytes

    Blood samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the hematology parameters: hematocrit, lymphocytes/leukocytes, mixed cells/leukocytes, neutrophils/leukocytes. Change from baseline in hematology parameters: hematocrit, lymphocytes/leukocytes, mixed cells/leukocytes, neutrophils/leukocytes at Day 1 were reported.

    Time frame: Baseline, Day 1

  13. Change From Baseline in Hematology Parameters: Leukocytes and Platelets

    Blood samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the hematology parameters: leukocytes and platelets. Change from baseline in hematology parameters: leukocytes and platelets at Day 1 were reported.

    Time frame: Baseline, Day 1

  14. Change From Baseline in Chemistry Parameters: Alanine Aminotransferase and Aspartate Aminotransferase

    Blood samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the chemistry parameters: Alanine Aminotransferase and Aspartate Aminotransferase. Change from baseline in chemistry parameters: Alanine Aminotransferase and Aspartate Aminotransferase at Day 1 were reported.

    Time frame: Baseline, Day 1

  15. Change From Baseline in Chemistry Parameters: Bilirubin, Creatinine and Direct Bilirubin

    Blood samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the chemistry parameters: bilirubin, creatinine and direct bilirubin. Change from baseline in chemistry parameters: bilirubin, creatinine and direct bilirubin at Day 1 were reported.

    Time frame: Baseline, Day 1

  16. Change From Baseline in Chemistry Parameter: C Reactive Protein

    Blood samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the chemistry parameter: C reactive protein. Change from baseline in chemistry parameter: C reactive protein at Day 1 were reported.

    Time frame: Baseline, Day 1

  17. Change From Baseline in Chemistry Parameters: Glucose, Urea and Urea Nitrogen

    Blood samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the chemistry parameters: glucose, urea and urea nitrogen. Change from baseline in chemistry parameters: glucose, urea and urea nitrogen at Day 1 were reported.

    Time frame: Baseline, Day 1

  18. Change From Baseline in Chemistry Parameter: Total Protein

    Blood samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the chemistry parameter: total Protein. Change from baseline in chemistry parameter: total Protein at Day 1 were reported.

    Time frame: Baseline, Day 1

  19. Change From Baseline in Urinalyses Parameter: Specific Gravity of Urine

    Urine samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the urinalyses parameters: specific gravity. Change from baseline in urinalyses parameter: specific gravity Day 1 was reported.

    Time frame: Baseline, Day 1

  20. Change From Baseline in Urinalyses Parameter: Potential of Hydrogen (pH) of Urine

    Urine samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the urinalyses parameter: pH. Change from baseline in urinalyses parameter: pH at Day 1 was reported.

    Time frame: Baseline, Day 1

  21. Change From Baseline in Urinalyses Parameter: Urobilinogen

    Urine samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the urinalyses parameter: urobilinogen. Change from baseline in urinalyses parameter: urobilinogen at Day 1 were reported.

    Time frame: Baseline, Day 1

  22. Change From Baseline in Vital Signs: Diastolic Blood Pressure and Systolic Blood Pressure

    Diastolic blood pressure and systolic blood pressure were measured after at least 5 minutes of rest for the participant in a quiet sitting without distractions. Change from baseline in vital signs: diastolic blood pressure and systolic blood pressure at Week 3 were reported.

    Time frame: Baseline, Week 3

  23. Change From Baseline in Vital Signs: Pulse Rate

    Pulse rate was measured after at least 5 minutes of rest for the participant in a quiet sitting without distractions. Change from baseline in vital sign: pulse rate at Week 3 was reported.

    Time frame: Baseline, Week 3

  24. Change From Baseline in Vital Sign: Respiratory Rate

    Respiratory rate was measured after at least 5 minutes of rest for the participant in a quiet sitting without distractions. Change from baseline in vital sign: respiratory rate at Week 3 was reported.

    Time frame: Baseline, Week 3

  25. Change From Baseline in Vital Signs: Temperature

    Temperature was measured after at least 5 minutes of rest for the participant in a quiet sitting without distractions. Change from baseline in vital sign: temperature at Week 3 was reported.

    Time frame: Baseline, Week 3

  26. Number of Participants With Reaction to Study Intervention Administration

    Reaction to study intervention administration were recorded to describe tolerability as assessed by nurse/site staff for all children enrolled in the study. Reactions categorized as spitting, crying, diarrheas, sleepiness, abdominal pain, fever, vomiting and other. Number of participants with reaction to study intervention administration reported.

    Time frame: Day 1

  27. Cohort 1a, Cohort 1b, Cohort 4a and Cohort 4b: Palatability Assessment Based on Visual Analog Scale (VAS) Score

    Palatability of the study intervention was assessed using a human gustatory sensation test (100-millimeter \[mm\] visual analog scale \[VAS\]) incorporating a facial hedonic scale, where lower score (0) indicates "not acceptable/not liked at all" and higher score (100) indicates "very acceptable/liked very much".

    Time frame: Day 1

  28. Maximum Observed Plasma Concentration (Cmax) of Praziquantel (PZQ) Enantiomers: R-PZQ and S-PZQ

    Cmax was obtained directly from the plasma concentration versus time curve.

    Time frame: Pre-dose, 0.5, 1, 2, 3, 4, 6, 8, 12 hours post-dose

  29. Time to Reach Maximum Plasma Concentration (Tmax) of Praziquantel (PZQ) Enantiomers: R-PZQ and S-PZQ

    Tmax was obtained directly from the plasma concentration versus time curve.

    Time frame: Pre-dose, 0.5, 1, 2, 3, 4, 6, 8, 12 hours post-dose

  30. Area Under the Plasma Concentration-Time Curve From Time Zero to Last Measurable Concentration (AUC0-t) of Praziquantel (PZQ) Enantiomers: R-PZQ and S-PZQ

    Area under the plasma concentration versus time curve from time zero to the last sampling time t at which the concentration was at or above the lower limit of quantification (LLOQ). AUC0-t was calculated according to the mixed log-linear trapezoidal rule.

    Time frame: Pre-dose, 0.5, 1, 2, 3, 4, 6, 8, 12 hours post-dose

07

Results

Posted Mar 21, 2024

Participant flow

Participant flow — Overall Study
MilestoneCohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Started1005030183060
Completed1004930183060
Not completed010000
Withdrew: Participant travelled outside study area010000

Outcome measures

PrimaryCohort 1a and Cohort 1b: Number of Participants With Clinical Cure Determined by Kato-Katz Method

Clinical cure was defined as no parasite egg in the stool at Week 3 as determined by the Kato-Katz method. Number of participants with clinical cure were reported.

Time frame:
at Week 3
Reported as:
Count of participants · Participants
Cohort 1a and Cohort 1b: Number of Participants With Clinical Cure Determined by Kato-Katz Method
ParticipantsCohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kg
Cohort 1a and Cohort 1b: Number of Participants With Clinical Cure Determined by Kato-Katz Method8639
SecondaryCohort 2 and Cohort 3: Number of Participants With Clinical Cure Determined by Kato-Katz Method

Clinical cure was defined as no parasite egg in the stool at Week 3 as determined by the Kato-Katz method. Number of participants with clinical cure were reported.

Time frame:
at Week 3
Reported as:
Count of participants · Participants
Cohort 2 and Cohort 3: Number of Participants With Clinical Cure Determined by Kato-Katz Method
ParticipantsCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kg
Cohort 2 and Cohort 3: Number of Participants With Clinical Cure Determined by Kato-Katz Method2717
SecondaryCohort 4a and Cohort 4b: Number of Participants With Clinical Cure Determined by Urine Filtration Technique

Clinical cure was defined as no parasite egg in the urine samples at follow up as determined by the urine filtration technique. Number of participants with clinical cure were reported.

Time frame:
Week 3 and Week 5
Reported as:
Count of participants · Participants
Cohort 4a and Cohort 4b: Number of Participants With Clinical Cure Determined by Urine Filtration Technique
ParticipantsCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Week 31750
Week 5—55
SecondaryCohort 1a, Cohort 1b, Cohort 2 and Cohort 3: Egg Reduction Rate (Percent [%]) Determined by Kato-Katz Method

Percentage of reduction in group mean egg count was calculated as relative difference between the post-treatment arithmetic mean egg count and pre-treatment arithmetic mean egg count at baseline count, (pre-treatment mean egg count minus post-treatment mean egg count divided by pre-treatment mean egg count) \*100. Egg counts were determined by the Kato-Katz method.

Time frame:
Pre-treatment, Week 3 post-treatment
Reported as:
Number · percent reduction in egg count
Cohort 1a, Cohort 1b, Cohort 2 and Cohort 3: Egg Reduction Rate (Percent [%]) Determined by Kato-Katz Method
percent reduction in egg countCohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kg
Cohort 1a, Cohort 1b, Cohort 2 and Cohort 3: Egg Reduction Rate (Percent [%]) Determined by Kato-Katz Method99.5 (98.8 to 99.9)99.2 (97.6 to 99.8)88.5 (56.4 to 100.0)95.6 (77.0 to 100.0)
SecondaryCohort 4a and Cohort 4b: Egg Reduction Rate (Percent [%]) Determined by Urine Filtration Technique

Percentage of reduction in group mean egg count was calculated as relative difference between the post-treatment arithmetic mean egg count and pre-treatment arithmetic mean egg count at baseline count, (pre-treatment mean egg count minus post-treatment mean egg count divided by pre-treatment mean egg count) \*100. Egg counts were determined by the urine filtration technique.

Time frame:
Pre-treatment, Weeks 3 and 5 post-treatment
Reported as:
Number · percent reduction in egg count
Cohort 4a and Cohort 4b: Egg Reduction Rate (Percent [%]) Determined by Urine Filtration Technique
percent reduction in egg countCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Week 399.4 (98.8 to 99.8)99.2 (98.2 to 99.8)
Week 5—99.3 (97.6 to 100.0)
SecondaryCohort 1a, Cohort 1b, Cohort 2, and Cohort 3: Number of Participants With Clinical Cure Determined by Point-of-Care Circulating Cathodic Antigen (POC-CCA) Test

Clinical cure is defined as absence of test line in the POC-CCA test cassette (that is no Schistosoma antigens detected). Number of participants with clinical cure were reported.

Time frame:
at Week 3
Reported as:
Count of participants · Participants
Cohort 1a, Cohort 1b, Cohort 2, and Cohort 3: Number of Participants With Clinical Cure Determined by Point-of-Care Circulating Cathodic Antigen (POC-CCA) Test
ParticipantsCohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kg
Cohort 1a, Cohort 1b, Cohort 2, and Cohort 3: Number of Participants With Clinical Cure Determined by Point-of-Care Circulating Cathodic Antigen (POC-CCA) Test63261813
SecondaryNumber of Participants With Treatment-emergent Adverse Events (TEAEs), Serious TEAEs and Treatment-Related TEAEs

Adverse Event (AE) was defined any untoward medical occurrence in a participant administered with a study drug, which does not necessarily had a causal relationship with this treatment. Serious AE was defined AE that resulted in any of the following outcomes: death; life threatening; persistent/significant disability/incapacity; initial/prolonged inpatient hospitalization; congenital anomaly/birth defect. TEAEs: TEAEs were defined as those events with onset dates/time occurring after study intervention administration or events that worsen after study intervention administration. TEAEs included serious TEAEs and non-serious TEAEs. Treatment-related TEAEs: reasonably related to the study intervention.

Time frame:
up to Day 40
Reported as:
Count of participants · Participants
Number of Participants With Treatment-emergent Adverse Events (TEAEs), Serious TEAEs and Treatment-Related TEAEs
ParticipantsCohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Participants with TEAEs66312014928
Participants with serious TEAEs000001
Participants with treatment-related TEAEs311416405
SecondaryNumber of Participants With Treatment Emergent Adverse Events (TEAEs) by Severity According to Qualitative Toxicity Scale

Severity of TEAEs were graded using Qualitative Toxicity Scale, as follows: Mild: Participant is aware of the event or symptom, but the event or symptom is easily tolerated; Moderate: Participant experiences sufficient discomfort to interfere with or reduce his or her usual level of activity; Severe: Significant impairment of functioning: the participant is unable to carry out his or her usual activities. Number of participants with TEAEs by severity were reported.

Time frame:
up to Day 40
Reported as:
Count of participants · Participants
Number of Participants With Treatment Emergent Adverse Events (TEAEs) by Severity According to Qualitative Toxicity Scale
ParticipantsCohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Mild57271914521
Moderate21892412
Severe111001
SecondaryChange From Baseline in Hematology Parameter: Erythrocytes Mean Corpuscular Hemoglobin

Blood samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the hematology parameter: erythrocytes mean corpuscular hemoglobin. Change from baseline in hematology parameter: erythrocytes mean corpuscular hemoglobin at Day 1 were reported.

Time frame:
Baseline, Day 1
Reported as:
Mean · picogram
Change From Baseline in Hematology Parameter: Erythrocytes Mean Corpuscular Hemoglobin
picogramCohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Change From Baseline in Hematology Parameter: Erythrocytes Mean Corpuscular Hemoglobin-0.12 ± 1.2730.20 ± 0.6650.18 ± 0.3480.34 ± 0.6990.02 ± 0.3250.30 ± 1.046
SecondaryChange From Baseline in Hematology Parameters: Erythrocytes Mean Corpuscular Hemoglobin (HGB) Concentration and Hemoglobin

Blood samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the hematology parameters: erythrocytes mean corpuscular HGB concentration and hemoglobin. Change from baseline in hematology parameters: erythrocytes mean corpuscular HGB concentration and hemoglobin at Day 1 were reported.

Time frame:
Baseline, Day 1
Reported as:
Mean · gram per liter (g/L)
Change From Baseline in Hematology Parameters: Erythrocytes Mean Corpuscular Hemoglobin (HGB) Concentration and Hemoglobin
gram per liter (g/L)Cohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Erythrocytes Mean Corpuscular HGB Concentration-0.6 ± 10.953.1 ± 9.975.2 ± 13.853.9 ± 11.254.5 ± 6.521.0 ± 11.82
Hemoglobin-0.8 ± 8.26-0.0 ± 11.56-4.4 ± 10.291.1 ± 7.22-0.1 ± 6.890.8 ± 7.43
SecondaryChange From Baseline in Hematology Parameter: Erythrocytes Mean Corpuscular Volume

Blood samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the hematology parameter: erythrocytes mean corpuscular volume. Change from baseline in hematology parameter: erythrocytes mean corpuscular volume at Day 1 were reported.

Time frame:
Baseline, Day 1
Reported as:
Mean · femtoliters
Change From Baseline in Hematology Parameter: Erythrocytes Mean Corpuscular Volume
femtolitersCohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Change From Baseline in Hematology Parameter: Erythrocytes Mean Corpuscular Volume-0.24 ± 2.657-0.04 ± 1.247-0.06 ± 0.9050.16 ± 2.101-0.88 ± 0.9480.61 ± 1.381
SecondaryChange From Baseline in Hematology Parameter: Erythrocytes

Blood samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the hematology parameter: erythrocytes. Change from baseline in hematology parameter: erythrocytes at Day 1 were reported.

Time frame:
Baseline, Day 1
Reported as:
Mean · 10^12 cells per liter
Change From Baseline in Hematology Parameter: Erythrocytes
10^12 cells per literCohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Change From Baseline in Hematology Parameter: Erythrocytes-0.003 ± 0.3245-0.061 ± 0.3792-0.240 ± 0.5650-0.044 ± 0.37240.001 ± 0.2921-0.028 ± 0.4000
SecondaryChange From Baseline in Hematology Parameters: Hematocrit, Lymphocytes/Leukocytes, Mixed Cells/Leukocytes, Neutrophils/Leukocytes

Blood samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the hematology parameters: hematocrit, lymphocytes/leukocytes, mixed cells/leukocytes, neutrophils/leukocytes. Change from baseline in hematology parameters: hematocrit, lymphocytes/leukocytes, mixed cells/leukocytes, neutrophils/leukocytes at Day 1 were reported.

Time frame:
Baseline, Day 1
Reported as:
Mean · percentage of cells
Change From Baseline in Hematology Parameters: Hematocrit, Lymphocytes/Leukocytes, Mixed Cells/Leukocytes, Neutrophils/Leukocytes
percentage of cellsCohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Hematocrit0.075 ± 3.3856-0.434 ± 3.0010-1.787 ± 3.9566-0.144 ± 2.6203-0.400 ± 2.37990.103 ± 3.0415
Lymphocytes/Leukocytes4.35 ± 10.6171.69 ± 9.1710.44 ± 10.3906.13 ± 7.5793.75 ± 7.9735.82 ± 8.456
Mixed Cells/Leukocytes-1.35 ± 6.5260.45 ± 7.5790.07 ± 4.8160.19 ± 4.5971.87 ± 4.278-1.19 ± 6.436
Neutrophils/Leukocytes-2.01 ± 13.738-3.03 ± 13.7330.15 ± 13.430-6.32 ± 8.848-11.68 ± 8.228-4.60 ± 11.336
SecondaryChange From Baseline in Hematology Parameters: Leukocytes and Platelets

Blood samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the hematology parameters: leukocytes and platelets. Change from baseline in hematology parameters: leukocytes and platelets at Day 1 were reported.

Time frame:
Baseline, Day 1
Reported as:
Mean · 10^9 cells per liter
Change From Baseline in Hematology Parameters: Leukocytes and Platelets
10^9 cells per literCohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Leukocytes-0.357 ± 2.2500-0.512 ± 2.3055-0.967 ± 1.90430.317 ± 2.1385-0.390 ± 1.98050.340 ± 1.9324
Platelets-21.2 ± 56.04-24.5 ± 39.08-28.6 ± 61.7549.7 ± 170.67-10.0 ± 33.12-14.0 ± 62.78
SecondaryChange From Baseline in Chemistry Parameters: Alanine Aminotransferase and Aspartate Aminotransferase

Blood samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the chemistry parameters: Alanine Aminotransferase and Aspartate Aminotransferase. Change from baseline in chemistry parameters: Alanine Aminotransferase and Aspartate Aminotransferase at Day 1 were reported.

Time frame:
Baseline, Day 1
Reported as:
Mean · units per liter (U/L)
Change From Baseline in Chemistry Parameters: Alanine Aminotransferase and Aspartate Aminotransferase
units per liter (U/L)Cohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Alanine Aminotransferase-1.91 ± 5.447-1.23 ± 6.245-2.03 ± 3.945-0.40 ± 5.959-1.27 ± 2.532-1.57 ± 3.614
Aspartate Aminotransferase-2.50 ± 9.271-0.59 ± 12.759-2.55 ± 8.9104.41 ± 27.941-2.87 ± 4.805-1.93 ± 4.430
SecondaryChange From Baseline in Chemistry Parameters: Bilirubin, Creatinine and Direct Bilirubin

Blood samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the chemistry parameters: bilirubin, creatinine and direct bilirubin. Change from baseline in chemistry parameters: bilirubin, creatinine and direct bilirubin at Day 1 were reported.

Time frame:
Baseline, Day 1
Reported as:
Mean · micromole per liter (mcmol/L)
Change From Baseline in Chemistry Parameters: Bilirubin, Creatinine and Direct Bilirubin
micromole per liter (mcmol/L)Cohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Bilirubin-1.48 ± 3.056-0.22 ± 2.5310.25 ± 3.651-1.62 ± 3.075——
Creatinine4.565 ± 10.72736.386 ± 13.93913.340 ± 16.79031.644 ± 8.27999.733 ± 10.72206.967 ± 13.1561
Direct Bilirubin0.09 ± 0.9370.06 ± 0.2780.05 ± 0.219-0.04 ± 0.144-0.05 ± 0.5230.07 ± 0.453
SecondaryChange From Baseline in Chemistry Parameter: C Reactive Protein

Blood samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the chemistry parameter: C reactive protein. Change from baseline in chemistry parameter: C reactive protein at Day 1 were reported.

Time frame:
Baseline, Day 1
Reported as:
Mean · milligram per liter (mg/L)
Change From Baseline in Chemistry Parameter: C Reactive Protein
milligram per liter (mg/L)Cohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Change From Baseline in Chemistry Parameter: C Reactive Protein0.411 ± 9.65460.004 ± 3.5448-0.336 ± 3.87920.872 ± 4.6025-0.588 ± 4.25720.283 ± 3.3653
SecondaryChange From Baseline in Chemistry Parameters: Glucose, Urea and Urea Nitrogen

Blood samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the chemistry parameters: glucose, urea and urea nitrogen. Change from baseline in chemistry parameters: glucose, urea and urea nitrogen at Day 1 were reported.

Time frame:
Baseline, Day 1
Reported as:
Mean · millimole per liter (mmol/L)
Change From Baseline in Chemistry Parameters: Glucose, Urea and Urea Nitrogen
millimole per liter (mmol/L)Cohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Glucose-0.056 ± 1.24260.277 ± 1.32650.207 ± 1.2011-0.354 ± 1.4042-0.070 ± 1.0867-0.052 ± 1.4386
Urea0.061 ± 0.11590.087 ± 0.06910.082 ± 0.06110.043 ± 0.0528——
Urea Nitrogen1.443 ± 1.22791.257 ± 1.16382.017 ± 1.75970.614 ± 0.98411.966 ± 1.23052.432 ± 1.3376
SecondaryChange From Baseline in Chemistry Parameter: Total Protein

Blood samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the chemistry parameter: total Protein. Change from baseline in chemistry parameter: total Protein at Day 1 were reported.

Time frame:
Baseline, Day 1
Reported as:
Mean · gram per liter (g/L)
Change From Baseline in Chemistry Parameter: Total Protein
gram per liter (g/L)Cohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Change From Baseline in Chemistry Parameter: Total Protein-5.20 ± 5.001-6.32 ± 5.018-6.22 ± 7.2410.16 ± 4.918-3.40 ± 5.308-3.18 ± 4.959
SecondaryChange From Baseline in Urinalyses Parameter: Specific Gravity of Urine

Urine samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the urinalyses parameters: specific gravity. Change from baseline in urinalyses parameter: specific gravity Day 1 was reported.

Time frame:
Baseline, Day 1
Reported as:
Mean · ratio
Change From Baseline in Urinalyses Parameter: Specific Gravity of Urine
ratioCohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Change From Baseline in Urinalyses Parameter: Specific Gravity of Urine0.0066 ± 0.007970.0064 ± 0.007220.0060 ± 0.007810.0039 ± 0.009320.0047 ± 0.007870.0091 ± 0.00704
SecondaryChange From Baseline in Urinalyses Parameter: Potential of Hydrogen (pH) of Urine

Urine samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the urinalyses parameter: pH. Change from baseline in urinalyses parameter: pH at Day 1 was reported.

Time frame:
Baseline, Day 1
Reported as:
Mean · pH
Change From Baseline in Urinalyses Parameter: Potential of Hydrogen (pH) of Urine
pHCohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Change From Baseline in Urinalyses Parameter: Potential of Hydrogen (pH) of Urine-0.33 ± 1.176-0.54 ± 1.068-0.50 ± 1.017-0.11 ± 0.654-0.42 ± 0.872-0.43 ± 0.899
SecondaryChange From Baseline in Urinalyses Parameter: Urobilinogen

Urine samples were collected in a fasted condition (after a fast of at least 12 hours) to analyze the urinalyses parameter: urobilinogen. Change from baseline in urinalyses parameter: urobilinogen at Day 1 were reported.

Time frame:
Baseline, Day 1
Reported as:
Mean · mcmol/L
Change From Baseline in Urinalyses Parameter: Urobilinogen
mcmol/LCohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Change From Baseline in Urinalyses Parameter: Urobilinogen0.01 ± 4.0690.19 ± 4.3870.48 ± 2.3550.00 ± 0.000-0.03 ± 0.1460.01 ± 0.090
SecondaryChange From Baseline in Vital Signs: Diastolic Blood Pressure and Systolic Blood Pressure

Diastolic blood pressure and systolic blood pressure were measured after at least 5 minutes of rest for the participant in a quiet sitting without distractions. Change from baseline in vital signs: diastolic blood pressure and systolic blood pressure at Week 3 were reported.

Time frame:
Baseline, Week 3
Reported as:
Mean · millimeters of mercury (mmHg)
Change From Baseline in Vital Signs: Diastolic Blood Pressure and Systolic Blood Pressure
millimeters of mercury (mmHg)Cohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Diastolic Blood Pressure2.7 ± 10.922.0 ± 9.492.9 ± 10.58-1.3 ± 10.271.2 ± 12.494.1 ± 11.73
Systolic Blood Pressure-0.5 ± 12.37-1.4 ± 12.170.3 ± 12.580.8 ± 8.06-1.8 ± 9.783.7 ± 12.07
SecondaryChange From Baseline in Vital Signs: Pulse Rate

Pulse rate was measured after at least 5 minutes of rest for the participant in a quiet sitting without distractions. Change from baseline in vital sign: pulse rate at Week 3 was reported.

Time frame:
Baseline, Week 3
Reported as:
Mean · beats per minute
Change From Baseline in Vital Signs: Pulse Rate
beats per minuteCohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Change From Baseline in Vital Signs: Pulse Rate-1.8 ± 14.65-2.6 ± 11.90-4.1 ± 20.46-9.6 ± 20.74-3.7 ± 18.78-1.7 ± 11.90
SecondaryChange From Baseline in Vital Sign: Respiratory Rate

Respiratory rate was measured after at least 5 minutes of rest for the participant in a quiet sitting without distractions. Change from baseline in vital sign: respiratory rate at Week 3 was reported.

Time frame:
Baseline, Week 3
Reported as:
Mean · breaths per minute
Change From Baseline in Vital Sign: Respiratory Rate
breaths per minuteCohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Change From Baseline in Vital Sign: Respiratory Rate0.5 ± 4.09-0.1 ± 3.63-1.0 ± 2.98-3.4 ± 8.91-2.6 ± 3.85-0.9 ± 4.02
SecondaryChange From Baseline in Vital Signs: Temperature

Temperature was measured after at least 5 minutes of rest for the participant in a quiet sitting without distractions. Change from baseline in vital sign: temperature at Week 3 was reported.

Time frame:
Baseline, Week 3
Reported as:
Mean · degree Celsius
Change From Baseline in Vital Signs: Temperature
degree CelsiusCohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Change From Baseline in Vital Signs: Temperature-0.02 ± 0.482-0.04 ± 0.5290.21 ± 0.734-0.10 ± 0.484-0.01 ± 0.5290.08 ± 0.427
SecondaryNumber of Participants With Reaction to Study Intervention Administration

Reaction to study intervention administration were recorded to describe tolerability as assessed by nurse/site staff for all children enrolled in the study. Reactions categorized as spitting, crying, diarrheas, sleepiness, abdominal pain, fever, vomiting and other. Number of participants with reaction to study intervention administration reported.

Time frame:
Day 1
Reported as:
Count of participants · Participants
Number of Participants With Reaction to Study Intervention Administration
ParticipantsCohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Crying148822
Spitting136603
Diarrhoea1634202
Sleepiness737201
Abdominal pain2199002
Fever110000
Vomiting744100
Other310001
SecondaryCohort 1a, Cohort 1b, Cohort 4a and Cohort 4b: Palatability Assessment Based on Visual Analog Scale (VAS) Score

Palatability of the study intervention was assessed using a human gustatory sensation test (100-millimeter \[mm\] visual analog scale \[VAS\]) incorporating a facial hedonic scale, where lower score (0) indicates "not acceptable/not liked at all" and higher score (100) indicates "very acceptable/liked very much".

Time frame:
Day 1
Reported as:
Median · score on a scale
Cohort 1a, Cohort 1b, Cohort 4a and Cohort 4b: Palatability Assessment Based on Visual Analog Scale (VAS) Score
score on a scaleCohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Cohort 1a, Cohort 1b, Cohort 4a and Cohort 4b: Palatability Assessment Based on Visual Analog Scale (VAS) Score84.0 (54.0 to 91.0)50.0 (26.0 to 87.0)88.0 (69.0 to 91.0)88.0 (79.0 to 92.0)
SecondaryMaximum Observed Plasma Concentration (Cmax) of Praziquantel (PZQ) Enantiomers: R-PZQ and S-PZQ

Cmax was obtained directly from the plasma concentration versus time curve.

Time frame:
Pre-dose, 0.5, 1, 2, 3, 4, 6, 8, 12 hours post-dose
Reported as:
Mean · nanogram per milliliter (ng/mL)
Maximum Observed Plasma Concentration (Cmax) of Praziquantel (PZQ) Enantiomers: R-PZQ and S-PZQ
nanogram per milliliter (ng/mL)Cohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
R-PZO347 ± 281.459.3 ± 60.391470 ± 1326NA ± NA523 ± 667.7300 ± 239.7
S-PZO1.27 ± 2.834343 ± 298.90.00 ± 0.000NA ± NA0.00 ± 0.0000.360 ± 1.394
SecondaryTime to Reach Maximum Plasma Concentration (Tmax) of Praziquantel (PZQ) Enantiomers: R-PZQ and S-PZQ

Tmax was obtained directly from the plasma concentration versus time curve.

Time frame:
Pre-dose, 0.5, 1, 2, 3, 4, 6, 8, 12 hours post-dose
Reported as:
Median · hours
Time to Reach Maximum Plasma Concentration (Tmax) of Praziquantel (PZQ) Enantiomers: R-PZQ and S-PZQ
hoursCohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
R-PZO02.00 (0.500 to 8.00)01.00 (0.00 to 12.0)03.00 (01.00 to 12.0)NA (NA to NA)1.50 (0.500 to 6.02)03.00 (0.500 to 8.02)
S-PZO0.00 (0.00 to 4.00)2.49 (0.500 to 12.0)0.00 (0.00 to 8.00)NA (NA to NA)0.00 (0.00 to 5.00)0.00 (0.00 to 5.00)
SecondaryArea Under the Plasma Concentration-Time Curve From Time Zero to Last Measurable Concentration (AUC0-t) of Praziquantel (PZQ) Enantiomers: R-PZQ and S-PZQ

Area under the plasma concentration versus time curve from time zero to the last sampling time t at which the concentration was at or above the lower limit of quantification (LLOQ). AUC0-t was calculated according to the mixed log-linear trapezoidal rule.

Time frame:
Pre-dose, 0.5, 1, 2, 3, 4, 6, 8, 12 hours post-dose
Reported as:
Mean · hours*nanogram per milliliter (h*ng/mL)
Area Under the Plasma Concentration-Time Curve From Time Zero to Last Measurable Concentration (AUC0-t) of Praziquantel (PZQ) Enantiomers: R-PZQ and S-PZQ
hours*nanogram per milliliter (h*ng/mL)Cohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
R-PZO1080 ± 1036184 ± 150.02720 ± 1718NA ± NA1190 ± 1110907 ± 776.3
S-PZO2.84 ± 0.90721240 ± 1124————

Adverse events

Collected over up to Day 40. Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Cohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kg0/100 (0%)0/100 (0%)66/100 (66%)
Cohort 1b: 4 to 6 Years Biltricide® 40 mg/kg0/50 (0%)0/50 (0%)31/50 (62%)
Cohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kg0/30 (0%)0/30 (0%)20/30 (66.7%)
Cohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kg0/18 (0%)0/18 (0%)14/18 (77.8%)
Cohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kg0/30 (0%)0/30 (0%)9/30 (30%)
Cohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg0/60 (0%)1/60 (1.7%)28/60 (46.7%)
Most frequent serious events
Most frequent serious events
EventCohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
MalariaInfections and infestations0/1000/500/300/180/301/60
Most frequent other events
Showing 10 of 27
Most frequent other events
EventCohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kg
Abdominal painGastrointestinal disorders23/10010/509/300/180/302/60
SomnolenceNervous system disorders8/1003/508/302/180/301/60
DiarrhoeaGastrointestinal disorders18/1003/504/302/180/302/60
GastroenteritisInfections and infestations3/1001/501/303/180/303/60
Upper respiratory tract infectionInfections and infestations4/1001/503/301/185/303/60
Rhinitis allergicRespiratory, thoracic and mediastinal disorders1/1001/500/303/181/304/60
Urinary tract infectionInfections and infestations2/1002/500/303/180/301/60
VomitingGastrointestinal disorders8/1005/504/301/181/300/60
Tinea capitisInfections and infestations3/1003/502/301/183/301/60
NeutropeniaBlood and lymphatic system disorders0/1000/501/300/180/305/60

Baseline characteristics

Safety analysis population (SAF) included all participants who received 1 dose of study treatment.

Age, Continuous
Age, Continuous(years)Cohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kgTotal
Mean5.4 ± 0.695.5 ± 0.833.0 ± 0.591.4 ± 0.434.6 ± 1.495.1 ± 1.514.8 ± 1.54
Sex: Female, Male
Sex: Female, Male(Participants)Cohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kgTotal
Female52211611928137
Male48291472132151
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Cohort 1a: 4 to 6 Years L-PZQ ODT 50 mg/kgCohort 1b: 4 to 6 Years Biltricide® 40 mg/kgCohort 2: 2 to 3 Years L-PZQ ODT 50 mg/kgCohort 3: 3 to 24 Months L-PZQ ODT 50 mg/kgCohort 4a: 3 Months to 6 Years L-PZQ ODT 50 mg/kgCohort 4b: 3 Months to 6 Years L-PZQ ODT 60 mg/kgTotal
American Indian or Alaska Native0000000
Asian0000000
Native Hawaiian or Other Pacific Islander0000000
Black or African American1005030183060288
White0000000
More than one race0000000
Unknown or Not Reported0000000
08

Study locations

2 sites
  • Universitè de Cocody
    Abidjan, 22BP770, Côte D'Ivoire
  • Kemri Kisumu
    Kisumu, 40100, Kenya
09

References and documents

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

Individual participant data

Plan to share: Yes — We are committed to enhancing public health through responsible sharing of clinical trial data. Following approval of a new product or a new indication for an approved product in both the US and European Union, the study sponsor and/or its affiliated companies will share study protocols, anonymized patient data and study level data, and redacted clinical study reports with qualified scientific and medical researchers, upon request, as necessary for conducting legitimate research. Further information on how to request data can be found on our website bit.ly/IPD21

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

Time frame: Within six months after the approval of a new product or a new indication for an approved product in both the United States and the European Union

Access criteria: Qualified scientific and medical researchers can request the data. Such requests must be submitted in writing to the company's portal and will be internally reviewed regarding criteria for researchers' qualification and legitimacy of the research proposal.

Data sharing details ↗ · bit.ly

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 21, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT03845140
Responsible party
Sponsor
First posted
Feb 19, 2019
Start date
Sep 2, 2019
Primary completion
Oct 11, 2021
Completion
Oct 11, 2021
Results posted
Mar 21, 2024
Last update
Mar 21, 2024

Study contacts

Medical Responsible
study director · Merck KGaA, Darmstadt, Germany

Oversight

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

Not currently enrolling

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

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