A Phase 3 interventional study of Etavopivat Tablets Low dose and Etavopivat Tablets High dose in Sickle Cell Disease, sponsored by Forma Therapeutics, Inc.. Active, not recruiting at 142 sites in 17 countries. Open to participants aged 12 Years to 65 Years. Per ClinicalTrials.gov, last updated 2026-04-06.
Sponsored by Forma Therapeutics, Inc. (part of Novo Nordisk A/S) · Phase 3, Interventional, and Treatment
This clinical trial is a Phase 2/3 study that will evaluate the efficacy and safety of etavopivat and test how well etavopivat works compared to placebo to improve the amount of hemoglobin in the blood and to reduce the number of vaso-occlusive crises (times when the blood vessels become blocked and cause pain).
Etavopivat is designed to activate PKR and thereby modulate RBC metabolism by impacting two critical pathways in RBCs. The etavopivat clinical development program will investigate whether decreasing 2,3-DPG may help oxygen bind to hemoglobin (i.e. increasing oxygen affinity), and thereby increase ATP and impact RBC function. This study is a randomized, placebo-controlled, double-blind, multicenter Phase 2/3 study of patients age 12 to 65 years (inclusive), with sickle cell disease. There is one planned interim analyses in this study design. Initially, patients will be randomized at 1:1:1 to one of two dose levels of etavopivat or placebo. At the first interim analysis, one of the two etavopivat dose levels will be selected for the Phase 3 portion of the study, in which patients will be randomized at 1:1 to the selected etavopivat dose or placebo. Efficacy on hemoglobin will be evaluated at conclusion of the double-blind treatment period. Following completion of 52 weeks of double-blind treatment, patients may enter a 112-week etavopivat open-label extension period.
1,134 studies on the registry are indexed under Anemia, Sickle Cell; 238 are open to participants now.
This study's planned enrollment of 450 is above the median of 40 across 769 interventional studies indexed under Anemia, Sickle Cell.
Browse Anemia, Sickle Cell studies →Forma Therapeutics, Inc. is the lead sponsor of 10 studies on the registry; 2 are open to participants now.
Of its 5 completed or terminated interventional studies of FDA-regulated products, 3 (60%) have results posted.
First submitted before Forma Therapeutics, Inc. became part of Novo Nordisk A/S.
Counted across the registry records on this site, refreshed daily.
Key Inclusion Criteria:
Key Exclusion Criteria:
Hepatic dysfunction characterized by:
History of unstable or deteriorating cardiac or pulmonary disease within 6 months prior to consent including but not limited to the following:
Prior/Concomitant Therapy
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.
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).
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
CYP3A is a group of enzymes, mainly CYP3A4, in the liver and gut that break down many medicines. Some medicines, supplements and foods (grapefruit, St John’s wort) slow them down or speed them up, which changes how much of a study drug stays in the body.
Studies list them so they can be avoided or switched; bring a list of everything you take, including supplements.
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).
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Childbearing potential
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraception
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ALT and AST (liver enzymes)
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ULN (upper limit of normal)
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Bilirubin
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
HIV
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis B tests
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis C tests
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Clinically significant
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
CYP3A (CYP3A4) inhibitors and inducers
CYP3A is a group of enzymes, mainly CYP3A4, in the liver and gut that break down many medicines. Some medicines, supplements and foods (grapefruit, St John’s wort) slow them down or speed them up, which changes how much of a study drug stays in the body.
Studies list them so they can be avoided or switched; bring a list of everything you take, including supplements.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Double blind etavopivat Low Dose
Drug: Etavopivat Tablets Low dose
Double blind etavopivat High Dose
Drug: Etavopivat Tablets High dose
Double blind placebo
Drug: Placebo Tablets
Open label etavopivat
Drug: Etavopivat Tablets
200 mg once daily
Also known as: FT-4202
400 mg once daily
Also known as: FT-4202
Placebo once daily
Also known as: placebo
Selected dose once daily
Also known as: FT-4202
Hemoglobin response rate
Hemoglobin response rate at Week 24 (increase of \> 1 g/dL \[\> 10 g/L\] from baseline) during the blinded treatment period
Time frame: 24 Weeks
Annualized vaso-occlusive crisis
Annualized vaso-occlusive crisis rate during the 52-week blinded treatment period based on adjudicated vaso-occlusive crisis review
Time frame: 52 Weeks
Hemoglobin
Change from baseline in hemoglobin at Week 52 during the blinded treatment period
Time frame: 52 Weeks
Absolute reticulocyte count
Change in absolute reticulocyte count from baseline at Week 24 during the blinded treatment period
Time frame: 24 Weeks
Indirect bilirubin
Change in unconjugated bilirubin from baseline at Week 24 during the blinded treatment period
Time frame: 24 Weeks
Lactate dehydrogenase
Change in lactate dehydrogenase from baseline at Week 24 during the blinded treatment period
Time frame: 24 Weeks
Vaso-occlusive crisis
Time to first vaso-occlusive crisis during the blinded treatment period
Time frame: 52 Weeks
Fatigue
Change in Patient-Reported Outcome Measurement Information System (PROMIS) Fatigue Scale from baseline in adult patients at Week 52 during the blinded treatment period
Time frame: 52 Weeks
Showing the first 100 of 142 sites across 17 countries. Choose a country and city above to see the rest.
Ran from Jan 2021 to primary completion in Feb 2026, 60 months.
Of 35 phase 3 interventional studies under Anemia, Sickle Cell, half reached primary completion within 48 months of starting (the median), counting those still running; a quarter within 36 and three quarters within 61. This study's 60 months is above that.
How these figures are worked out, and which studies are left out of them.
This study is active, not recruiting, as verified in Mar 2026. You cannot join it, but the record below documents what was studied.
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Studies of the drug tested here: Etavopivat