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Phase2a Primaquine Dose Escalation Study

Phase 2a Dose Escalation Study of the Efficacy, Safety, and Pharmacokinetics of Low Dose Primaquine for Gametocytocidal Activity Against P. Falciparum in Sub-Saharan Africa and South East Asia

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT01743820
Enrollment
81
Registered
2012-12-06
Start date
2013-09-30
Completion date
2014-12-31
Last updated
2015-01-19

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Malaria

Brief summary

The purpose of this study is to evaluate the safety, efficacy, and pharmacokinetics of low single-dose primaquine for gametocidal activity against P.falciparum among adult glucose-6-phosphate dehydrogenase (G6PD)-normal malaria patients.

Interventions

DRUGdihydroartemisinin-piperaquine
DRUG0.125 mg/kg Primaquine
DRUG0.5 mg/kg Primaquine
DRUG0.0625 mg/kg Primaquine

Sponsors

Malaria Research and Training Center, Bamako, Mali
CollaboratorOTHER
Shoklo Malaria Research Unit
CollaboratorOTHER
Mahidol Oxford Tropical Medicine Research Unit
CollaboratorOTHER
Bill and Melinda Gates Foundation
CollaboratorOTHER
Wellcome Trust
CollaboratorOTHER
University of California, San Francisco
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)

Eligibility

Sex/Gender
MALE
Age
18 Years to 50 Years
Healthy volunteers
Yes

Inclusion criteria

* Male * Age \>= 18 years and \< 50 years * Malaria blood thick film positive * Presence of gametocytes on thick blood film * Agrees to admission to study ward for 26 hours post diagnosis and available for follow up visits * No allergies to study drugs * Hemoglobin \>= 8 g/dl * No evidence of severe or chronic disease * Written, informed consent

Design outcomes

Primary

MeasureTime frameDescription
mosquito infectivity assessed through membrane feeding7 daysBaseline, Days 1, 2, 7

Secondary

MeasureTime frameDescription
gametocyte prevalence and density28 daysBaseline, Hours 2, 6, 12, 24, Days 2, 3, 7, 14, 28
primaquine pharmacokinetics - area under the curve (AUC) of parent drug and metabolite24 hoursHours 1, 2, 3, 4, 6, 8, 12, 24
asexual parasite prevalence and density28 daysBaseline, Hours 2, 6, 12, 24, Days 2, 3, 7, 14, 28
safety measurements including hemoglobin and signs of hemolysis28 daysBaseline, Days 1, 2, 3, 7, 14, 28

Countries

Mali

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Mar 14, 2026