Table 2 Toxin Induced ECG Effects
Toxins that prolong the QT interval | Toxins that prolong the QRS interval |
|---|---|
Antihistamines | Amantadine |
   Astemizole | Carbamazepine |
   Clarithromycin | Chloroquine |
   Diphenhydramine | Class IA antiarrhythmics |
   Loratidine | Disopyramide |
   Terfenadine | Quinidine |
Antipsychotics | Procainamide |
   Chlorpromazine | Class IC antiarrhythmics |
   Droperidol | Encainide |
   Haloperidol | Flecainide |
   Mesoridazine | Propafenone |
   Pimozide | Citalopram |
   Quetiapine | Cocaine |
   Risperidone | Cyclic Antidepressants |
   Thioridazine | Amitriptyline |
   Ziprasidone | Amoxapine |
Arsenic trioxide | Desipramine |
Bepridil | Doxepin |
Chloroquine | Imipramine |
Cisapride | Nortriptyline |
Citalopram | Maprotiline |
Clarithromycin | Diltiazem |
Class IA antiarrhythmics | Diphenhydramine |
   Disopyramide | Hydroxychloroquine |
   Quinidine | Loxapine |
   Procainamide | Orphenadrine |
Class IC antiarrhythmics | Phenothiazines |
   Encainide | Medoridazine |
   Flecainide | Thioridazine |
   Moricizine | Propranolol |
   Propafenone | Propoxyphene |
Class III antiarrhythmics | Quinine |
   Amiodarone | Verapamil |
   Dofetilide |  |
   Ibutilide |  |
   Sotalol |  |
Cyclic Antidepressants | Â |
Erythomycin | Â |
Fluoroquinolones | Â |
Halofantrine | Â |
Hydroxychloroquine | Â |
Levomethadyl | Â |
Methadone | Â |
Pentamidine | Â |
Quinine | Â |
Tacrolimus | Â |
Venlafaxine | Â |