Long-Term Safety Study of Tafenoquine

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

Get a concise snapshot of the trial, including recruitment status, study phase, enrollment targets, and key timeline milestones.

Recruitment Status

COMPLETED

Clinical Phase

PHASE2

Total Enrollment

600 participants

Study Classification

INTERVENTIONAL

Study Start Date

2017-10-05

Study Completion Date

2021-07-13

Brief Summary

Review the sponsor-provided synopsis that highlights what the study is about and why it is being conducted.

This randomized, double-blind, placebo controlled study will involve 600 healthy (Glucose-6-Phosphate Dehydrogenase \[G6PD\] normal) volunteers. Participants who meet the eligibility criteria will be randomized (ratio 1:1) to receive a loading dose of either tafenoquine 200 mg (2 x 100 mg tablets) or placebo daily for three consecutive days, followed by study treatment (tafenoquine 200 mg or placebo) once per week for 51 weeks, with safety follow-up visits at Weeks 4, 12, 24, and 52. All participants will return to the clinic at Week 64 for an end of study visit. If the participant has an ongoing AE at the Week 64 visit will continue to be assessed for up to 3 more times at approximately 12-week intervals or until resolution or stabilization of the AE whichever is earlier.

Related Clinical Trials

Explore similar clinical trials based on study characteristics and research focus.

Metabolism and Pharmacokinetics of Primaquine Enantiomers in Human Volunteers Receiving a Seven Day Dose Regimen

NCT03934450

Malaria Glucose 6 Phosphate Dehydrogenase Deficiency

COMPLETED PHASE1

A Single Dose Study Of PF-06291874 In Healthy Adult Subjects

NCT01499017

Healthy

TERMINATED PHASE1

Study to Evaluate Safety and Tolerability of Single Ascending Doses of Multiple Formulations of PF-06650833 in Healthy Subjects Under Fasted and Fed Conditions

NCT02224651

Healthy

COMPLETED PHASE1

A Study To Assess The Safety, Tolerability, And Pharmacokinetics (PK) Of Multiple Doses Of PF-06865571 In Healthy, Including Overweight And Obese, Adult Subjects

NCT03230383

Healthy Subjects

COMPLETED PHASE1

A Study To Understand Safety And Plasma Concentrations Of PF-06669571 During And Following The Oral Administration Of Single And Multiple Doses Of PF-06669571 In Healthy Volunteers Under Fasted And Fed Conditions

NCT02184429

Healthy

COMPLETED PHASE1

Detailed Description

Dive into the extended narrative that explains the scientific background, objectives, and procedures in greater depth.

Conditions

See the medical conditions and disease areas that this research is targeting or investigating.

Healthy Volunteers

Study Design

Understand how the trial is structured, including allocation methods, masking strategies, primary purpose, and other design elements.

Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

PREVENTION

Blinding Strategy

QUADRUPLE

Participants Caregivers Investigators Outcome Assessors

Identically matched placebo control.

Study Groups

Review each arm or cohort in the study, along with the interventions and objectives associated with them.

Tafenoquine 200 mg (2 x 100 mg tablets)

Tafenoquine 200 mg (2 x 100 mg tablets) daily for three consecutive days, followed by study treatment (tafenoquine 200 mg or placebo) once per week for 51 weeks

Group Type ACTIVE_COMPARATOR

Tafenoquine

Intervention Type DRUG

Tafenoquine 200mg

Placebo

Placebo daily for three consecutive days, followed by study treatment (tafenoquine 200 mg or placebo) once per week for 51 weeks

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type OTHER

Placebo

Interventions

Learn about the drugs, procedures, or behavioral strategies being tested and how they are applied within this trial.

Tafenoquine

Tafenoquine 200mg

Intervention Type DRUG

Placebo

Intervention Type OTHER

Eligibility Criteria

Check the participation requirements, including inclusion and exclusion rules, age limits, and whether healthy volunteers are accepted.

Inclusion Criteria

1. Completion of the written informed consent process (signed).
2. Male or female age 18 to 55 years inclusive, in good health as assessed by the Investigator.
3. Normal G6PD enzyme activity levels as defined by the parameters of the specific G6PD test employed at the local laboratory.
4. Negative HBsAg and HCV, HIV-1, HIV-2 antibody screen at the screening visit.
5. Negative serum pregnancy test.
6. Use acceptable method of birth control.
7. Hematology, biochemistry and urinalysis results at screening that are within the local laboratory reference range or, if outside the range, not clinically significant as judged by the Investigator in accordance with approved clinically acceptable laboratory ranges, documented prior to study start.
8. Willing and able to comply with all scheduled visits, treatment plan, laboratory tests, and other study procedures.

Exclusion Criteria

1. History of allergy or intolerance to tafenoquine, primaquine or any excipients.
2. History of thalassemia or current or past history of methemoglobinemia or methemoglobin \>2% at screening.
3. History of eye disease or surgery
4. Having previously received hydroxychloroquine for skin conditions or rheumatological diseases, chloroquine for malaria, tamoxifen, amiodarone or other drugs that may affect the optic nerve/retina/cornea within 30 days or 5 half-lives (whichever is longer) of study start. There are no travel restrictions, but the choice of concurrent anti-malarial must be atovaquone-proguanil if the participant chooses to take a registered antimalarial drug while travelling.
5. Any current diagnosis of Axis I psychiatric disorders

Minimum Eligible Age

18 Years

Maximum Eligible Age

55 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes