November 3, 2025 Medication-Induced Thrombotic Thrombocytopenic Purpura: A Life-Threatening Reaction You Need to Know Drug-induced thrombotic thrombocytopenic purpura (TTP) is a rare but deadly reaction to certain medications like quinine, clopidogrel, and cyclosporine. Learn the warning signs, which drugs are most dangerous, and what to do if you suspect TTP. Continue Reading