RT Journal Article SR Electronic T1 Clopidogrel and thrombotic thrombocytopenic purpura: No clear case for causality JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 466 OP 470 VO 70 IS 5 A1 Majhail, Navneet S. A1 Lichtin, Alan E. YR 2003 UL http://www.ccjm.org/content/70/5/466.abstract AB Although the antiplatelet agent clopidogrel is associated with an increased incidence of thrombotic thrombocytopenic purpura (TTP), available evidence is not sufficient to establish or disprove a causal relationship. We review and assess the evidence and case reports linking clopidogrel use with TTP and discuss how to approach the risk of TTP in patients taking clopidogrel.