Thrombotic Thrombocytopenia Purpura (TTP): Thrombotic thrombocytopenia purpura has been reported rarely following use of clopidogrel, sometimes after a short exposure (<2 weeks). It is a serious condition and requires urgent referral to a hematologist for prompt treatment. It is characterized by thrombocytopenia, microangiopathic hemolytic anemia [schistocytes (fragmented RBCs) seen on peripheral smear], neurological findings, renal dysfunction and fever.