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These are drug classes that can cause a prolonged QT interval

1-3: 0X
4-5: 1X
6-7: 2X
8: 3X

- AntiArrhythmics (IA and III) and Arsenic

- AntiBiotics (Macrolides and floroquinolones)

- AntiCychotics (Haloperidol) and Chloroquine

- AntiDepressants (TCAs) and Diuretics (Thiazides)

- AntiEmetics (Ondansetron)

- AntiFungals (Fluconazole)

- -Navirs (protease inhibitors)

- Opioids (Methadone)