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Open-Label Extension of Voxelotor

An Open-Label Extension Study of Voxelotor Administered Orally to Participants with Sickle Cell Disease Who Have Participated in Voxelotor Clinical Trials

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
PACTR
Registry ID
PACTR202209867711506
Enrollment
600
Registered
2022-09-05
Start date
2022-12-11
Completion date
Unknown
Last updated
2026-08-03

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

Conditions

Haematological Disorders Sickle Cell Disease

Interventions

Sponsors

Global Blood Therapeutics inc
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: A. Participants who meet all of the following criteria will be eligible for study enrollment: 1. Male or female participant with SCD who participated and received study drug in a GBT-sponsored voxelotor clinical study. Note: Participants who discontinued study drug due to an AE, but who remained on study, may be eligible for treatment in this study provided the AE does not pose a risk for treatment with voxelotor. Note: Participants who discontinued Study GBT440-032 as the result of an abnormal transcranial Doppler (TCD) flow velocity assessment (= 200 cm/sec) are eligible for treatment in this study. 2. Female participants of childbearing potential are required to have a negative urine pregnancy test prior to dosing on Day 1. Note: Female participants who become childbearing during the study must be willing to have a negative urine pregnancy test to remain in the study. 3. If sexually active, female participants of childbearing potential must use highly effective methods of contraception until 30 days after the last dose of study drug. If sexually active, male participants must use barrier methods of contraception until 30 days after the last dose of study drug. 4. Participant has provided written consent/assent (for pediatric participants, both the consent of the participant’s legal representative or legal guardian and the participant’s assent [where applicable] must be obtained)

Exclusion criteria

Exclusion criteria: 1. Female participant who is breastfeeding or pregnant. 2. Participant withdrew consent from a GBT-sponsored voxelotor clinical study. 3. Participant was lost to follow-up from a GBT-sponsored voxelotor clinical study. 4. Participant has any medical, psychological, safety, or behavioral conditions that, in the opinion of the Investigator, may confound safety interpretation, interfere with compliance, or preclude informed consent. 5. Active symptomatic coronavirus disease of 2019 (COVID-19) infection. 6. Known hypersensitivity to voxelotor or any other components of the study drug. 7. Use of St. John’s wort, sensitive cytochrome P450 (CYP) 3A4 substrates with a narrow therapeutic index, or moderate or strong CYP3A4 inducers within 30 days of Day 1.

Design outcomes

Primary

MeasureTime frame
1. TEAEs and SAEs [ Time Frame: Throughout entire study ] Treatment Emergent Adverse Events and Serious Adverse Events 2. Sickle Cell Disease-Related Complications [ Time Frame: Throughout entire study ] Frequency of SCD-related complications

Secondary

MeasureTime frame
Not Provided

Countries

Ghana, Kenya, Nigeria

Contacts

Public ContactAimee Enriquez

Senior Clinical Trial Manager. Global Blood Therapeutics

aenriquez@gbt.com+16507417777

Outcome results

None listed

Source: PACTR (via WHO ICTRP) · Data processed: Aug 9, 2026