Composition of placebo is identical to that of IMP except that 400mg active ingredient is replaced with 400mg mannitol. clinical trials

A Phase 3, Multicenter, Randomized, Double-Blind, Placebo Controlled, Parallel-Group Study with an Open-Label Extension to Evaluate the Efficacy and Safety of Oral Rilzabrutinib (PRN1008) in Adults and Adolescents with Persistent or Chronic Immune Thrombocytopenia (ITP).

This study is testing a new medicine called rilzabrutinib for adults with a blood condition called Immune Thrombocytopenia (ITP). It compares the new medicine to a dummy treatment to see if it can help increase blood platelet counts and improve quality of life.