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Study identifier: NCT04704999 Synced from ClinicalTrials.gov · July 29, 2026
● Recruiting

Southeast Asia Dose Optimization of Tafenoquine

Condition: Plasmodium Vivax Malaria  ·  Sponsor: University of Oxford

PhasePhase 4
Planned participants700
Who can joinAll sexes, 2 Years to no upper limit
Healthy volunteersNo

About this study

Tafenoquine was recently approved by regulatory authorities in the USA and Australia. Tafenoquine is an alternative radical curative treatment to primaquine acting against the dormant liver stage of Plasmodium vivax (the hypnozoite). Tafenoquine (an 8-aminoquinoline) has the substantial advantage of single dosing as compared to a 14-day course of primaquine to achieve radical cure. The recommended tafenoquine dose is 300 mg, which was shown to be significantly worse in radical curative efficacy to a total primaquine dose of 3.5 mg/kg in Southeast Asia. The cure rate of tafenoquine 300 mg in Southeast Asian study sites was only 74%. The comparator 3.5 mg/kg total primaquine dose is the standard and most commonly used dose globally, but in Southeast Asia and the Western Pacific, higher doses of primaquine are needed for radical cure. This study aims to determine the optimal dose of tafenoquine in Southeast Asia.

This description comes directly from the study's public registry record.

Talk to the study team

Cindy Chu, MD, PhD  ·  +856 (0) 21 250 752  ·  cindy@tropmedres.ac

Always discuss trial participation with your own doctor first.

Locations (5)

Mahidol Oxford Tropical Medicine Research Unit (MORU), CambodiaSiem Reap, CambodiaNot Yet Recruiting
Lao Oxford Mahosot Hospital Wellcome Trust Research Unit (LOMWRU)Vientiane, LaosRecruiting
Mahidol Vivax Research Unit (MVRU)Bangkok, ThailandNot Yet Recruiting
Shoklo Malaria Research Unit (SMRU)Bangkok, ThailandNot Yet Recruiting
Oxford University Clinical Research Unit (OUCRU)Bình Phước, VietnamNot Yet Recruiting

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Source record: clinicaltrials.gov/study/NCT04704999