Clinical trials Our clinical trials TAK-079-3002 (anti-CD38 mAb for the treatment of ITP) Project Title A Study of Mezagitamab in Adults With Chronic Primary Immune Thrombocytopenia Official Title A Phase 3, Randomized, Double-blind, Placebo-controlled Study to Evaluate Efficacy and Safety of Mezagitamab Subcutaneous Injection in Participants With Chronic Primary Immune Thrombocytopenia Project Summary Primary immune thrombocytopenia (ITP) is a condition where the immune system mistakenly destroys platelets, which are cells that help stop bleeding. This leads to a low number of platelets, making it easier to bruise or bleed. The main aim of this study is to learn whether mezagitamab, when given just under the skin (subcutaneously [SC]), is effective in keeping the platelet count of adults with ITP stable when compared to a placebo. A placebo looks like medicine but doesn't have any active ingredients in it. The participants will be treated with mezagitamab for up to 6 months. During the study, participants will visit their study clinic several times. Participants who complete the TAK-079-3002 study or do not have any response to study treatment by week 16 (according to study criteria) will be given the opportunity to participate in a continuation study to receive open label mezagitamab (if they are eligible and the site is able to open the continuation study) Blood Disorder Immune Thrombocytopenic Purpura (ITP) Patient Recruitment Details Patient recruitment status: recruiting Number of patients (Globally) 171