ClinicalTrials.gg
CompletedNCT06184399IverpedUpdated Sep 22, 2025Results posted

Efficacy, Safety and Acceptability of Ivermectin ODT in PSAC

A Phase 2 interventional study of Ivermectin 1.5 mg ODT and Ivermectin 3 mg Oral Tablet in Trichuriasis, Ascariasis and Hookworm Infections, sponsored by Jennifer Keiser. Completed at 1 site in Tanzania. Open to participants aged 2 Years to 5 Years. Per ClinicalTrials.gov, last updated 2025-09-22.

Sponsored by Jennifer Keiser · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Enrollment
260
Allocation
Randomized
Ages
2 Years to 5 Years
Sex
All
01

Study summary

This study is a single-blind randomized controlled dose-ranging trial aiming at providing evidence on the on the optimal dose of co-administered ivermectin and albendazole in terms of efficacy, safety and acceptability in preschool-aged children (PSAC; aged 2-5 years) infected with whipworm (Trichuris trichiura) on Pemba Island, Tanzania. Additionally, the pharmacokinetics of the newly developed oro-dispersible tablets (ODTs) and the standard ivermectin tablets (Stromectol®) will be compared in this age group.

As measure of efficacy of the treatment the cure rate (percentage of egg-positive participants at baseline who become egg-negative after treatment) will be determined 14-21 days post-treatment.

Read the detailed description

This study is a single-blind randomized controlled dose-ranging trial aiming at providing evidence on the optimal dose of co-administered ivermectin and albendazole in terms of efficacy, safety and acceptability in preschool-aged children (PSAC; aged 2-5 years) infected with whipworm (Trichuris trichiura) on Pemba Island, Tanzania. Additionally, the pharmacokinetics of the newly developed ODTs and the standard ivermectin tablets (Stromectol®) will be compared in this age group.

The primary objective of the trial is to comparatively assess the efficacy in terms of cure rate (CR) against T. trichiura infections among PSAC receiving different doses of ivermectin.

The secondary objectives of the trial are to compare the egg reduction rates (ERRs) of the treatment regimens against T. trichiura, to determine the CRs and ERRs of the drugs in study participants co-infected with A. lumbricoides and hookworm, and to evaluate the safety and tolerability of the treatment regimens.

In addition, this study aims to characterize population pharmacokinetics of the ivermectin ODTs compared to standard tablets in T. trichiura infected individuals, and to assess the acceptability of the treatments.

After obtaining informed consent from parents and/or caregivers, the medical history of the participants will be assessed with a standardized questionnaire, in addition to a clinical examination carried out by the study physician before treatment. Enrollment will be based on two stool samples, which will be collected, if possible, on two consecutive days or otherwise within a maximum of 5 days. All stool samples will be examined with duplicated Kato-Katz thick smears by experienced laboratory technicians.

Randomization of participants into the six treatment arms will be stratified according to intensity of infection and age. All participants will be interviewed before treatment, and at 3 and 24 hours and 14-21 days after treatment about the occurrence of adverse events. The efficacy of the treatment will be determined 14-21 days post-treatment by collecting another two stool samples.

The primary analysis will include all participants with primary end point data (available case analysis). Supplementary, a per-protocol analysis will be conducted. CRs will be calculated as the percentage of egg-positive participants at baseline who become egg-negative after treatment. Differences among CRs between treatment arms will be analysed using crude and adjusted logistic regression modeling (adjustment for age, sex and weight). Geometric and arithmetic mean egg counts will be calculated for the different treatment arms before and after treatment to assess the corresponding ERRs. Bootstrap resampling method with 5,000 replicates will be used to calculate 95% confidence intervals (CIs) for differences in ERRs.Using the DoseFinding package of the statistical software environment R, Emax models will be implemented to predict the dose-response curves based on CRs and ERRs.

Adverse events will be compiled into frequency tables and compared between treatment groups using descriptive summary statistics.

02

Conditions studied

  • Trichuriasis
  • Ascariasis
  • Hookworm Infections

Keywords

  • Ivermectin
  • Albendazole
  • Anthelminthics
  • Trichuris trichiura
  • Ascaris lumbricoides
  • Hookworm
  • Whipworm
  • Soil-transmitted helminths
03

In context

Trichuriasis

30 studies on the registry are indexed under Trichuriasis; 7 are open to participants now.

This study's enrollment of 260 is below the median of 315 across 27 interventional studies indexed under Trichuriasis.

Browse Trichuriasis studies →

Lead sponsor

Jennifer Keiser is the lead sponsor of 17 studies on the registry; 3 are open to participants now.

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

04

Who can participate

Ages eligible
2 Years to 5 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

  • individuals aged 2-5 years (24-71 months; confirmed by birth certificate or similar document)
  • having given written signed by parents/caregivers
  • being able and willing to provide two stool samples at baseline and at follow-up assessment (14-21 days)
  • having at least two out of four Kato-Katz slides positive for T. trichiura at baseline
  • being able and willing to be examined by a study physician before and after treatment

Exclusion criteria

Exclusion Criteria:

  • presence or signs of major systemic illness, e.g. fever (temporal body temperature of >38.0°C), severe anaemia ( level of \<70 g/l)
  • history of severe acute disease or unmanaged, severe chronic disease (i.e., condition is not as therapeutically controlled as necessary)
  • use of anthelminthic drugs during study period
  • known allergy to study medication (i.e., ivermectin or albendazole)
  • being prescribed or taking concomitantly medication with known or drug interactions with the study medication
  • concurrent participation in other clinical trials
Terms in these criteria, in plain language(3)

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.

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.

05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Participant)
Enrollment
260 participants (actual)

Study arms

  • Placebo comparator
    Arm A: Ivermectin ODT Placebo & Albendazole

    Placebo for ivermectin (oro-dispersible tablets) and albendazole (Zentel®, 1 tablet of 400 mg) administered orally at day 0

    Drug: Albendazole 400 mg Oral Tablet · Drug: Placebo Ivermectin ODT

  • Experimental
    Arm B: Ivermectin ODT 100 µg/kg & Albendazole

    Combination therapy of ivermectin (100 µg/kg using oro-dispersible tablets of 1.5 mg) and albendazole (Zentel®, 1 tablet of 400 mg) administered orally at day 0

    Drug: Ivermectin 1.5 mg ODT · Drug: Albendazole 400 mg Oral Tablet

  • Experimental
    Arm C: Ivermectin ODT 200 µg/kg & Albendazole

    Combination therapy of ivermectin (200 µg/kg using oro-dispersible tablets of 1.5 mg) and albendazole (Zentel®, 1 tablet of 400 mg) administered orally at day 0

    Drug: Ivermectin 1.5 mg ODT · Drug: Albendazole 400 mg Oral Tablet

  • Experimental
    Arm D: Ivermectin ODT 300 µg/kg & Albendazole

    Combination therapy of ivermectin (300 µg/kg using oro-dispersible tablets of 1.5 mg) and albendazole (Zentel®, 1 tablet of 400 mg) administered orally at day 0

    Drug: Ivermectin 1.5 mg ODT · Drug: Albendazole 400 mg Oral Tablet

  • Experimental
    Arm E: Ivermectin ODT 400 µg/kg & Albendazole

    Combination therapy of ivermectin (400 µg/kg using oro-dispersible tablets of 1.5 mg) and albendazole (Zentel®, 1 tablet of 400 mg) administered orally at day 0

    Drug: Ivermectin 1.5 mg ODT · Drug: Albendazole 400 mg Oral Tablet

  • Active comparator
    Arm F: Ivermectin standard tablets & Albendazole

    Combination therapy of ivermectin (Stromectol®, 200 µg/kg using tablets of 3 mg) and albendazole (Zentel®, 1 tablet of 400 mg) administered orally at day 0

    Drug: Ivermectin 3 mg Oral Tablet · Drug: Albendazole 400 mg Oral Tablet

Interventions

06

What researchers measure

Primary outcomes

  1. Cure Rate (CR) Against T. Trichiura

    The CR will be calculated as the proportion of participants converting from being egg-positive pre-treatment to egg-negative post-treatment.

    Time frame: 14-21 days post-treatment

Secondary outcomes

  1. Egg Reduction Rate (ERR) Against T. Trichiura (Geometric Mean ERR)

    Eggs per gram of stool (EPG) will be assessed by adding up the egg counts from the quadruplicate Kato-Katz thick smears and multiplying this number by a factor of six. Geometric and arithmetic mean egg counts will be calculated for the two treatment arms before and after treatment to assess the corresponding ERRs.

    Time frame: 14-21 days post-treatment

  2. Egg Reduction Rate (ERR) Against T. Trichiura (Arithmetic Mean ERR)

    Eggs per gram of stool (EPG) will be assessed by adding up the egg counts from the quadruplicate Kato-Katz thick smears and multiplying this number by a factor of six. Geometric and arithmetic mean egg counts will be calculated for the two treatment arms before and after treatment to assess the corresponding ERRs.

    Time frame: 14-21 days post-treatment

  3. Cure Rate (CR) Against A. Lumbricoides

    The CR will be calculated as the proportion of participants converting from being egg-positive pre-treatment to egg-negative post-treatment.

    Time frame: 14-21 days post-treatment

  4. Egg Reduction Rate (ERR) Against A. Lumbricoides (Geometric Mean ERR)

    Eggs per gram of stool (EPG) will be assessed by adding up the egg counts from the quadruplicate Kato-Katz thick smears and multiplying this number by a factor of six. Geometric and arithmetic mean egg counts will be calculated for the two treatment arms before and after treatment to assess the corresponding ERRs.

    Time frame: 14-21 days post-treatment

  5. Egg Reduction Rate (ERR) Against A. Lumbricoides (Arithmetic Mean ERR)

    Eggs per gram of stool (EPG) will be assessed by adding up the egg counts from the quadruplicate Kato-Katz thick smears and multiplying this number by a factor of six. Geometric and arithmetic mean egg counts will be calculated for the two treatment arms before and after treatment to assess the corresponding ERRs.

    Time frame: 14-21 days post-treatment

  6. Cure Rate (CR) Against Hookworm

    The CR will be calculated as the proportion of participants converting from being egg-positive pre-treatment to egg-negative post-treatment.

    Time frame: 14-21 days post-treatment

  7. Egg Reduction Rate (ERR) Against Hookworm (Geometric Mean ERR)

    Eggs per gram of stool (EPG) will be assessed by adding up the egg counts from the quadruplicate Kato-Katz thick smears and multiplying this number by a factor of six. Geometric and arithmetic mean egg counts will be calculated for the two treatment arms before and after treatment to assess the corresponding ERRs.

    Time frame: 14-21 days post-treatment

  8. Egg Reduction Rate (ERR) Against Hookworm (Arithmetic Mean ERR)

    Eggs per gram of stool (EPG) will be assessed by adding up the egg counts from the quadruplicate Kato-Katz thick smears and multiplying this number by a factor of six. Geometric and arithmetic mean egg counts will be calculated for the two treatment arms before and after treatment to assess the corresponding ERRs.

    Time frame: 14-21 days post-treatment

  9. Number of Participants Reporting Adverse Events (AEs)

    Participants will be monitored at the site for 3 hours following treatment for any acute AEs and reassessment will be done at 24h post-treatment. In addition, participants will be interviewed 3 and 24 hours after treatment and retrospectively at days 14-21 about the occurrence of AEs.

    Time frame: 3 hours, 24 hours and 14-21 days post-treatment

Other outcomes

  1. Blood Concentration of Ivermectin

    For characterization of population pharmacokinetics (PK), ivermectin concentration will be quantified using a validated liquid chromatography tandem mass spectrometry (LC-MS/MS) method. Drug concentrations will be calculated by interpolation from a calibration curve with a lower limit of quantification of 1-5 ng/ml.

    Time frame: 0 to 24 hours post-treatment

  2. Acceptability of ODT Assessed by Visual Analogue Scale (0-100 mm)

    To determine the acceptability of ivermectin ODTs compared to standard tablets, the palatability of each formulation will be rated by children aged 4-5 years using a visual analogue scale with continuous scores from 0 mm (worst taste) to 100 mm (best taste).

    Time frame: 15 min post-treatment

07

Results

Posted Sep 22, 2025

Participant flow

Participant flow — Overall Study
MilestoneArm A: Ivermectin ODT Placebo & AlbendazoleArm B: Ivermectin ODT 100 µg/kg & AlbendazoleArm C: Ivermectin ODT 200 µg/kg & AlbendazoleArm D: Ivermectin ODT 300 µg/kg & AlbendazoleArm E: Ivermectin ODT 400 µg/kg & AlbendazoleArm F: Ivermectin Standard Tablets & Albendazole
Started434442444443
Completed404242394042
Not completed320541

Outcome measures

PrimaryCure Rate (CR) Against T. Trichiura

The CR will be calculated as the proportion of participants converting from being egg-positive pre-treatment to egg-negative post-treatment.

Time frame:
14-21 days post-treatment
Reported as:
Number · percentage of participants cured (%)
Cure Rate (CR) Against T. Trichiura
percentage of participants cured (%)Arm A: Ivermectin ODT Placebo & AlbendazoleArm B: Ivermectin ODT 100 µg/kg & AlbendazoleArm C: Ivermectin ODT 200 µg/kg & AlbendazoleArm D: Ivermectin ODT 300 µg/kg & AlbendazoleArm E: Ivermectin ODT 400 µg/kg & AlbendazoleArm F: Ivermectin Standard Tablets & Albendazole
Cure Rate (CR) Against T. Trichiura17.5 (7.3 to 32.8)50.0 (34.2 to 65.8)83.3 (68.6 to 93.0)84.6 (69.5 to 94.1)90.0 (76.3 to 97.2)73.8 (58.0 to 86.1)
SecondaryEgg Reduction Rate (ERR) Against T. Trichiura (Geometric Mean ERR)

Eggs per gram of stool (EPG) will be assessed by adding up the egg counts from the quadruplicate Kato-Katz thick smears and multiplying this number by a factor of six. Geometric and arithmetic mean egg counts will be calculated for the two treatment arms before and after treatment to assess the corresponding ERRs.

Time frame:
14-21 days post-treatment
Reported as:
Geometric mean · percent change in egg counts (%)
Egg Reduction Rate (ERR) Against T. Trichiura (Geometric Mean ERR)
percent change in egg counts (%)Arm A: Ivermectin ODT Placebo & AlbendazoleArm B: Ivermectin ODT 100 µg/kg & AlbendazoleArm C: Ivermectin ODT 200 µg/kg & AlbendazoleArm D: Ivermectin ODT 300 µg/kg & AlbendazoleArm E: Ivermectin ODT 400 µg/kg & AlbendazoleArm F: Ivermectin Standard Tablets & Albendazole
Egg Reduction Rate (ERR) Against T. Trichiura (Geometric Mean ERR)65.5 (30.5 to 83.5)97.2 (93.9 to 98.8)99.7 (99.2 to 99.9)99.7 (99.1 to 99.9)99.8 (99.5 to 100.0)99.2 (97.9 to 99.8)
SecondaryEgg Reduction Rate (ERR) Against T. Trichiura (Arithmetic Mean ERR)

Eggs per gram of stool (EPG) will be assessed by adding up the egg counts from the quadruplicate Kato-Katz thick smears and multiplying this number by a factor of six. Geometric and arithmetic mean egg counts will be calculated for the two treatment arms before and after treatment to assess the corresponding ERRs.

Time frame:
14-21 days post-treatment
Reported as:
Mean · percent change in egg counts (%)
Egg Reduction Rate (ERR) Against T. Trichiura (Arithmetic Mean ERR)
percent change in egg counts (%)Arm A: Ivermectin ODT Placebo & AlbendazoleArm B: Ivermectin ODT 100 µg/kg & AlbendazoleArm C: Ivermectin ODT 200 µg/kg & AlbendazoleArm D: Ivermectin ODT 300 µg/kg & AlbendazoleArm E: Ivermectin ODT 400 µg/kg & AlbendazoleArm F: Ivermectin Standard Tablets & Albendazole
Egg Reduction Rate (ERR) Against T. Trichiura (Arithmetic Mean ERR)30.2 (-11.0 to 54.2)88.3 (79.6 to 94.3)98.9 (96.8 to 99.7)97.9 (94.4 to 99.6)98.3 (95.6 to 99.9)79.8 (38.7 to 97.2)
SecondaryCure Rate (CR) Against A. Lumbricoides

The CR will be calculated as the proportion of participants converting from being egg-positive pre-treatment to egg-negative post-treatment.

Time frame:
14-21 days post-treatment
Reported as:
Number · percentage of participants cured (%)
Cure Rate (CR) Against A. Lumbricoides
percentage of participants cured (%)Arm A: Ivermectin ODT Placebo & AlbendazoleArm B: Ivermectin ODT 100 µg/kg & AlbendazoleArm C: Ivermectin ODT 200 µg/kg & AlbendazoleArm D: Ivermectin ODT 300 µg/kg & AlbendazoleArm E: Ivermectin ODT 400 µg/kg & AlbendazoleArm F: Ivermectin Standard Tablets & Albendazole
Cure Rate (CR) Against A. Lumbricoides100.0 (69.2 to 100.0)100.0 (75.3 to 100.0)100.0 (63.1 to 100.0)100.0 (59.0 to 100.0)100.0 (59.0 to 100.0)100.0 (66.4 to 100.0)
SecondaryEgg Reduction Rate (ERR) Against A. Lumbricoides (Geometric Mean ERR)

Eggs per gram of stool (EPG) will be assessed by adding up the egg counts from the quadruplicate Kato-Katz thick smears and multiplying this number by a factor of six. Geometric and arithmetic mean egg counts will be calculated for the two treatment arms before and after treatment to assess the corresponding ERRs.

Time frame:
14-21 days post-treatment
Reported as:
Geometric mean · percent change in egg counts (%)
Egg Reduction Rate (ERR) Against A. Lumbricoides (Geometric Mean ERR)
percent change in egg counts (%)Arm A: Ivermectin ODT Placebo & AlbendazoleArm B: Ivermectin ODT 100 µg/kg & AlbendazoleArm C: Ivermectin ODT 200 µg/kg & AlbendazoleArm D: Ivermectin ODT 300 µg/kg & AlbendazoleArm E: Ivermectin ODT 400 µg/kg & AlbendazoleArm F: Ivermectin Standard Tablets & Albendazole
Egg Reduction Rate (ERR) Against A. Lumbricoides (Geometric Mean ERR)100.0 (100.0 to 100.0)100.0 (100.0 to 100.0)100.0 (100.0 to 100.0)100.0 (100.0 to 100.0)100.0 (100.0 to 100.0)100.0 (100.0 to 100.0)
SecondaryEgg Reduction Rate (ERR) Against A. Lumbricoides (Arithmetic Mean ERR)

Eggs per gram of stool (EPG) will be assessed by adding up the egg counts from the quadruplicate Kato-Katz thick smears and multiplying this number by a factor of six. Geometric and arithmetic mean egg counts will be calculated for the two treatment arms before and after treatment to assess the corresponding ERRs.

Time frame:
14-21 days post-treatment
Reported as:
Mean · percent change in egg counts (%)
Egg Reduction Rate (ERR) Against A. Lumbricoides (Arithmetic Mean ERR)
percent change in egg counts (%)Arm A: Ivermectin ODT Placebo & AlbendazoleArm B: Ivermectin ODT 100 µg/kg & AlbendazoleArm C: Ivermectin ODT 200 µg/kg & AlbendazoleArm D: Ivermectin ODT 300 µg/kg & AlbendazoleArm E: Ivermectin ODT 400 µg/kg & AlbendazoleArm F: Ivermectin Standard Tablets & Albendazole
Egg Reduction Rate (ERR) Against A. Lumbricoides (Arithmetic Mean ERR)100.0 (100.0 to 100.0)100.0 (100.0 to 100.0)100.0 (100.0 to 100.0)100.0 (100.0 to 100.0)100.0 (100.0 to 100.0)100.0 (100.0 to 100.0)
SecondaryCure Rate (CR) Against Hookworm

The CR will be calculated as the proportion of participants converting from being egg-positive pre-treatment to egg-negative post-treatment.

Time frame:
14-21 days post-treatment
Reported as:
Number · percentage of participants cured (%)
Cure Rate (CR) Against Hookworm
percentage of participants cured (%)Arm A: Ivermectin ODT Placebo & AlbendazoleArm B: Ivermectin ODT 100 µg/kg & AlbendazoleArm C: Ivermectin ODT 200 µg/kg & AlbendazoleArm D: Ivermectin ODT 300 µg/kg & AlbendazoleArm E: Ivermectin ODT 400 µg/kg & AlbendazoleArm F: Ivermectin Standard Tablets & Albendazole
Cure Rate (CR) Against Hookworm100.0 (63.1 to 100.0)45.5 (16.8 to 76.6)62.5 (24.5 to 91.5)70.0 (34.8 to 93.3)71.4 (29.0 to 96.3)57.1 (18.4 to 90.1)
SecondaryEgg Reduction Rate (ERR) Against Hookworm (Geometric Mean ERR)

Eggs per gram of stool (EPG) will be assessed by adding up the egg counts from the quadruplicate Kato-Katz thick smears and multiplying this number by a factor of six. Geometric and arithmetic mean egg counts will be calculated for the two treatment arms before and after treatment to assess the corresponding ERRs.

Time frame:
14-21 days post-treatment
Reported as:
Geometric mean · percent change in egg counts (%)
Egg Reduction Rate (ERR) Against Hookworm (Geometric Mean ERR)
percent change in egg counts (%)Arm A: Ivermectin ODT Placebo & AlbendazoleArm B: Ivermectin ODT 100 µg/kg & AlbendazoleArm C: Ivermectin ODT 200 µg/kg & AlbendazoleArm D: Ivermectin ODT 300 µg/kg & AlbendazoleArm E: Ivermectin ODT 400 µg/kg & AlbendazoleArm F: Ivermectin Standard Tablets & Albendazole
Egg Reduction Rate (ERR) Against Hookworm (Geometric Mean ERR)100.0 (100.0 to 100.0)93.1 (78.4 to 98.2)97.4 (83.0 to 99.8)97.9 (92.4 to 100.0)98.6 (94.0 to 100.0)97.1 (87.4 to 99.7)
SecondaryEgg Reduction Rate (ERR) Against Hookworm (Arithmetic Mean ERR)

Eggs per gram of stool (EPG) will be assessed by adding up the egg counts from the quadruplicate Kato-Katz thick smears and multiplying this number by a factor of six. Geometric and arithmetic mean egg counts will be calculated for the two treatment arms before and after treatment to assess the corresponding ERRs.

Time frame:
14-21 days post-treatment
Reported as:
Mean · percent change in egg counts (%)
Egg Reduction Rate (ERR) Against Hookworm (Arithmetic Mean ERR)
percent change in egg counts (%)Arm A: Ivermectin ODT Placebo & AlbendazoleArm B: Ivermectin ODT 100 µg/kg & AlbendazoleArm C: Ivermectin ODT 200 µg/kg & AlbendazoleArm D: Ivermectin ODT 300 µg/kg & AlbendazoleArm E: Ivermectin ODT 400 µg/kg & AlbendazoleArm F: Ivermectin Standard Tablets & Albendazole
Egg Reduction Rate (ERR) Against Hookworm (Arithmetic Mean ERR)100.0 (100.0 to 100.0)85.7 (54.4 to 93.1)88.9 (66.7 to 99.2)92.8 (83.6 to 100.0)92.2 (82.8 to 100.0)62.3 (38.6 to 98.6)
SecondaryNumber of Participants Reporting Adverse Events (AEs)

Participants will be monitored at the site for 3 hours following treatment for any acute AEs and reassessment will be done at 24h post-treatment. In addition, participants will be interviewed 3 and 24 hours after treatment and retrospectively at days 14-21 about the occurrence of AEs.

Time frame:
3 hours, 24 hours and 14-21 days post-treatment
Reported as:
Number · participants
Number of Participants Reporting Adverse Events (AEs)
participantsArm A: Ivermectin ODT Placebo & AlbendazoleArm B: Ivermectin ODT 100 µg/kg & AlbendazoleArm C: Ivermectin ODT 200 µg/kg & AlbendazoleArm D: Ivermectin ODT 300 µg/kg & AlbendazoleArm E: Ivermectin ODT 400 µg/kg & AlbendazoleArm F: Ivermectin Standard Tablets & Albendazole
3 hours: Abdominal pain111001
3 hours: Diarrhoea000000
3 hours: Vomiting000000
24 hours: Abdominal pain320120
24 hours: Diarrhoea100040
24 hours: Vomiting000020
14-21 days: Abdominal pain000000
14-21 days: Diarrhoea000000
14-21 days: Vomiting000000
Other pre-specifiedBlood Concentration of Ivermectin

For characterization of population pharmacokinetics (PK), ivermectin concentration will be quantified using a validated liquid chromatography tandem mass spectrometry (LC-MS/MS) method. Drug concentrations will be calculated by interpolation from a calibration curve with a lower limit of quantification of 1-5 ng/ml.

Time frame:
0 to 24 hours post-treatment

Results for this outcome have not been posted.

Other pre-specifiedAcceptability of ODT Assessed by Visual Analogue Scale (0-100 mm)

To determine the acceptability of ivermectin ODTs compared to standard tablets, the palatability of each formulation will be rated by children aged 4-5 years using a visual analogue scale with continuous scores from 0 mm (worst taste) to 100 mm (best taste).

Time frame:
15 min post-treatment

Results for this outcome have not been posted.

Adverse events

Collected over 2-3 weeks. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Arm A: Ivermectin ODT Placebo & Albendazole0/43 (0%)0/43 (0%)4/43 (9.3%)
Arm B: Ivermectin ODT 100 µg/kg & Albendazole0/44 (0%)0/44 (0%)3/44 (6.8%)
Arm C: Ivermectin ODT 200 µg/kg & Albendazole0/42 (0%)0/42 (0%)1/42 (2.4%)
Arm D: Ivermectin ODT 300 µg/kg & Albendazole0/44 (0%)0/44 (0%)1/44 (2.3%)
Arm E: Ivermectin ODT 400 µg/kg & Albendazole0/44 (0%)0/44 (0%)7/44 (15.9%)
Arm F: Ivermectin Standard Tablets & Albendazole0/43 (0%)0/43 (0%)1/43 (2.3%)
Most frequent other events
Most frequent other events
EventArm A: Ivermectin ODT Placebo & AlbendazoleArm B: Ivermectin ODT 100 µg/kg & AlbendazoleArm C: Ivermectin ODT 200 µg/kg & AlbendazoleArm D: Ivermectin ODT 300 µg/kg & AlbendazoleArm E: Ivermectin ODT 400 µg/kg & AlbendazoleArm F: Ivermectin Standard Tablets & Albendazole
DiarrhoeaGastrointestinal disorders1/430/440/420/444/440/43
Abdominal painGastrointestinal disorders3/433/441/421/442/441/43
VomitingGastrointestinal disorders0/430/440/420/442/440/43

Baseline characteristics

Age, Continuous
Age, Continuous(years)Arm A: Ivermectin ODT Placebo & AlbendazoleArm B: Ivermectin ODT 100 µg/kg & AlbendazoleArm C: Ivermectin ODT 200 µg/kg & AlbendazoleArm D: Ivermectin ODT 300 µg/kg & AlbendazoleArm E: Ivermectin ODT 400 µg/kg & AlbendazoleArm F: Ivermectin Standard Tablets & AlbendazoleTotal
Mean3.7 ± 1.13.6 ± 1.13.5 ± 1.03.6 ± 1.03.5 ± 1.03.7 ± 1.23.6 ± 1.1
Sex: Female, Male
Sex: Female, Male(Participants)Arm A: Ivermectin ODT Placebo & AlbendazoleArm B: Ivermectin ODT 100 µg/kg & AlbendazoleArm C: Ivermectin ODT 200 µg/kg & AlbendazoleArm D: Ivermectin ODT 300 µg/kg & AlbendazoleArm E: Ivermectin ODT 400 µg/kg & AlbendazoleArm F: Ivermectin Standard Tablets & AlbendazoleTotal
Female222024242126137
Male212418202317123
Race and Ethnicity Not Collected
Race and Ethnicity Not Collected(Participants)Arm A: Ivermectin ODT Placebo & AlbendazoleArm B: Ivermectin ODT 100 µg/kg & AlbendazoleArm C: Ivermectin ODT 200 µg/kg & AlbendazoleArm D: Ivermectin ODT 300 µg/kg & AlbendazoleArm E: Ivermectin ODT 400 µg/kg & AlbendazoleArm F: Ivermectin Standard Tablets & AlbendazoleTotal
Count of participants——————0
Region of Enrollment
Region of Enrollment(participants)Arm A: Ivermectin ODT Placebo & AlbendazoleArm B: Ivermectin ODT 100 µg/kg & AlbendazoleArm C: Ivermectin ODT 200 µg/kg & AlbendazoleArm D: Ivermectin ODT 300 µg/kg & AlbendazoleArm E: Ivermectin ODT 400 µg/kg & AlbendazoleArm F: Ivermectin Standard Tablets & AlbendazoleTotal
Tanzania434442444443260
Trichuris trichiura infection intensity
Trichuris trichiura infection intensity(Participants)Arm A: Ivermectin ODT Placebo & AlbendazoleArm B: Ivermectin ODT 100 µg/kg & AlbendazoleArm C: Ivermectin ODT 200 µg/kg & AlbendazoleArm D: Ivermectin ODT 300 µg/kg & AlbendazoleArm E: Ivermectin ODT 400 µg/kg & AlbendazoleArm F: Ivermectin Standard Tablets & AlbendazoleTotal
Light (<1000 EPG)363634353634211
Moderate (1000-9999 EPG)78798948
Heavy (>9999 EPG)0010001
Ascaris lumbricoides co-infection
Ascaris lumbricoides co-infection(Participants)Arm A: Ivermectin ODT Placebo & AlbendazoleArm B: Ivermectin ODT 100 µg/kg & AlbendazoleArm C: Ivermectin ODT 200 µg/kg & AlbendazoleArm D: Ivermectin ODT 300 µg/kg & AlbendazoleArm E: Ivermectin ODT 400 µg/kg & AlbendazoleArm F: Ivermectin Standard Tablets & AlbendazoleTotal
Count of participants1013879956
Hookworm co-infection
Hookworm co-infection(Participants)Arm A: Ivermectin ODT Placebo & AlbendazoleArm B: Ivermectin ODT 100 µg/kg & AlbendazoleArm C: Ivermectin ODT 200 µg/kg & AlbendazoleArm D: Ivermectin ODT 300 µg/kg & AlbendazoleArm E: Ivermectin ODT 400 µg/kg & AlbendazoleArm F: Ivermectin Standard Tablets & AlbendazoleTotal
Count of participants8118108752
08

Study locations

1 site
  • Public Health Laboratory Ivo de Carneri
    Chake Chake, Tanzania
09

References and documents

Publications

  • Sprecher VP, Schnoz A, Biendl S, Hussein HS, Najim SO, Ali MN, Mohammed IS, Ali SM, Hattendorf J, Keiser J. Efficacy and safety of ascending doses of orodispersible ivermectin co-administered with albendazole for Trichuris trichiura infections in preschool-aged children in Tanzania: a single-blind, randomised, controlled, dose-ranging, phase 2 trial. Lancet Infect Dis. 2026 Feb;26(2):160-169. doi: 10.1016/S1473-3099(25)00472-4. Epub 2025 Sep 17. PubMed 40975108 ↗

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

10

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from Jun 2024 to primary completion in Aug 2024, 2 months.

Results were first posted in Sep 2025, 1 year 1 month after primary completion.

How these figures are worked out, and which studies are left out of them.

Registered
Dec 14, 2023
First posted
Dec 28, 2023
StartActual
Jun 5, 2024
Primary completionActual
Aug 9, 2024
CompletionActual
Aug 9, 2024
Results first posted
Sep 22, 2025
Last update
Sep 22, 2025
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Sep 22, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT06184399
Lead sponsor
Jennifer Keiser
Collaborators
Public Health Laboratory Ivo de Carneri
Responsible party
Jennifer Keiser (Prof. Dr., Swiss Tropical & Public Health Institute) — Sponsor-investigator
First posted
Dec 28, 2023
Start date
Jun 5, 2024
Primary completion
Aug 9, 2024
Completion
Aug 9, 2024
Results posted
Sep 22, 2025
Last update
Sep 22, 2025

Oversight

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 2025. 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: Ivermectin

Start the discussion