A Phase 3b, Multi-center, Randomized, Double-blind, Placebo controlled, Parallel-group Trial with an Open-label Extension Phase to demonstrate that the efficacy of avatrombopag is superior to placebo for the treatment of pediatric subjects with ITP of ≥6 months duration who have had an insufficient response to a previous treatment.

About this Study

This Phase 3b, multi-center, randomized, double-blind, placebo-controlled, parallel-group study in pediatric subjects who have had a diagnosis of ITP for ≥6 months, includes a 12 week Core Phase followed by a 2 year open-label Extension Phase. 

Sponsor Protocol ID:AVA-PED-301
IRB Number:2020V0152
Actively Enrolling
Interventional
Phase 3
October 20, 2021
Eligibility Criteria
1 year old
18 years old
Both Male and Female
No
Yes
No

Inclusion Criteria1. Male or female subjects ≥1 and

2. Subject and/or subject’s legally authorized representative (LAR) must be able to provide informed consent and/or assent, as applicable. 

3. Female subjects of childbearing potential and who are sexually active and male subjects who are sexually active must agree to use highly effective methods of contraception. 


Exclusion Criteria1. Known secondary ITP. 

2. Body Mass Index (BMI) >30 kg/m2 

3. Any history of arterial or venous thrombosis, including partial or complete thrombosis. 

4. Subjects with known inherited thrombocytopenia (e.g., MYH-9 disorders). 

5. History of myelodysplastic syndrome (MDS). 

6. Known history of congenital heart abnormalities or arrhythmias. 

7. History of hepatitis B (HBV), hepatitis C (HCV), or human immunodeficiency virus (HIV). 

8. Known history of disseminated intravascular coagulation (DIC), hemolytic uremic syndrome (HUS), or thrombotic thrombocytopenic purpura (TTP). 

9. Subjects with Evans syndrome. 

10. Concurrent malignant disease.