| Class | Examples |
| Antiarrhythmic drugs | Amiodarone |
| Antidepressant drugs | SNRIs, SSRIs, tricyclics |
| Antiseizure medications | Bromides, carbamazepine, lacosamide, lamotrigine, phenytoin, valproic acid |
| Beta agonists | Albuterol, terbutaline |
| Glucocorticoids | Dexamethasone, prednisone |
| Mood stabilizers | Lithium |
| Other medications | Cyclosporine, tacrolimus, theophylline |
| Other substances | Caffeine, cocaine, nicotine |
| Sympathomimetics | Amphetamine salts, epinephrine, methylphenidate |
| Thyroid hormone | Levothyroxine |
| Toxins | Arsenic, cyanide, DDT, lead, lindane, manganese, mercury, naphthalene, toluene |
