There are myriad of drugs that can cause torsades de pointes secondart to prolongation of QT interval. These drugs can be learned through 2 easy mnemonics: 1) ABCDE A = antiArrhythmic drugs B = antiBiotics C = antipsyChotics D = antiDepressants E = antiEmetics 2) TOOQQRSADES T = Thiazides O = Olanzapine O = Opioids Q = Quinidine Q = Quinolones R = Riseperidone S = Sotalol A = Antihistamines D = antiDperessants E = Erythromycin [and other macrolide antibiotics] S = SSRIs Reference: https://www.medicowesome.com/2017/05/drugs-that-prolong-qt-interval-mnemonic.html Image via: https://jetem.org/torsades_depointes/