NCT01433978

A Phase 3, Multicenter, Randomized, Double-blind,Active-controlled, Parallel-group Trial With an Open-labelExtension Phase to Evaluate the Efficacy and Safety of OralE5501 Versus Eltrombopag, in Adults With Chronic ImmuneThrombocytopenia (Idiopathic Thrombocytopenic Purpura)

A Phase 3, Multicenter, Randomized, Double-blind, Active-controlled, Parallel-group Trial With an Open-label Extension Phase to Evaluate the Efficacy and Safety of Oral E5501 Versus Eltrombopag, in Adults With Chronic Immune Thrombocytopenia (Idiopathic Thrombocytopenic Purpura)

• Status: Terminated
• Phase: Phase 3
• Study type: Interventional
• Enrollment: 24 (actual)
• Sponsor: Eisai Inc. · Industry
• Sex: All
• Age: 18 Years – 99 Years
• Healthy volunteers: Not accepted

Summary

Core study: To compare the efficacy of avatrombopag (in addition to standard) of care to eltrombopag (in addition to standard of care) for the treatment of adult participants with chronic immune thrombocytopenia (idiopathic thrombocytopenic purpura \[ITP\]) as measured by durable platelet response. Open-label Extension Phase: To evaluate the safety and tolerability of long-term therapy with avatrombopag in participants with chronic ITP (cITP).

Detailed description

The study consists of three phases: Prerandomization, Randomization (Core Study) and Extension Phase. Participants 18 years of age and over, who meet all the eligibility requirements will be randomized into the study. It will require that splenectomized participants make up at least 35% of the study population and no single platelet count is greater than 35x10\^9/L. Participants will be centrally stratified at randomization by splenectomy status, baseline platelet count, and use of concomitant ITP medication at baseline and randomized to receive either double-blind avatrombopag or eltrombopag in a 1:1 ratio. Participants will receive blinded therapy at a starting dose of 20 mg avatrombopag once daily or 50 mg eltrombopag once daily. Participants will be allowed to have their dose titrated up (maximum dose 40 mg avatrombopag and 75 mg for eltrombopag) or down (minimum dose 5 mg for avatrombopag and 25 mg for eltrombopag) depending on their response to study drug. The goal of dose modification is to maintain the platelet count at levels greater than or equal to 50x10\^9/L and less than or equal to 150x10\^9/L, and to decrease the need for ITP-directed concomitant medications. The duration of treatment in the Core study and the Extension Phase is approximately 26 and 104 weeks, respectively.

Conditions

• Idiopathic Thrombocytopenic Purpura

Interventions

Type	Name	Description
DRUG	Eltrombopag
DRUG	Avatrombopag
DRUG	Standard of care	Permitted ITP concomitant background therapies are as follows: * Corticosteroids and/or azathioprine taken at a stable dose for 4 weeks before randomization; * Mycophenolate mofetil (MMF) or danazol taken at a stable dose for at least 12 weeks before randomization; * Cyclosporine A (CsA) (due to the fact that it is a P-glycoprotein-mediated transport \[P-gp\] inhibitor) is to be avoided unless deemed medically necessary; CsA taken at a stable dose for at least 12 weeks before randomization. At the discretion of the investigator, participants will be allowed to use aspirin, other salicylates, or approved adenosine diphosphate (ADP) receptor antagonists, (eg, clopidogrel, prasugrel) during the study once their platelet count had risen. Participants treated with proton pump inhibitors (PPIs) and H2 antagonist therapy will receive a stable dose for at least 6 weeks prior to randomization. Treatment with these therapies must have been completed at least 2 weeks prior to randomization.

Timeline

• Start date: 2012-03-26
• Primary completion: 2013-09-01
• Completion: 2013-09-01
• First posted: 2011-09-14
• Last updated: 2018-02-06
• Results posted: 2018-02-06

Locations

1 site across 1 country: United States

Regulatory

• FDA-regulated drug study