| Agent | Risk | Agent | Risk |
|---|---|---|---|
| Antiarrhythmics | Antithyroidals | ||
| Procainamide (Pronestyl) | high | Propylthiouracil (Propyl-thyracil) | low |
| Quinidine (Quinaglute) | moderate | ||
| Disopyramide (Norpace) | very low | ||
| Propafenone (Rythmol) | very low | ||
| Antihypertensives | Antibiotics | ||
| Hydralazine (Apresoline) | high | Isoniazid (INH) | low |
| Methyldopa (Aldomet) | low | Nitrofurantoin (Macrodantin) | very low |
| Captopril (Capoten) | low | Minocycline (Minocin) | low |
| Acebutolol (Sectral) | low | ||
| Enalapril (Vasotec) | very low | ||
| Clonidine (Catapres) | very low | Anti-Inflammatories | |
| Atenolol (Tenormin) | very low | D-Penicillamine (Cuprimine) | low |
| Labetalol (Normodyne, Trandate) | very low | Sulfasalazine (Azulfidine) | low |
| Pindolol (Visken) | very low | Phenylbutazone (Butazolidin) | very low |
| Minoxidil (Loniten) | very low | Diuretics | |
| Prazosin (Minipress) | very low | Chlorthalidone (Hygroton) | very low |
| Hydrochlorothiazide (Diuchlor h) | very low | ||
| Agent | Risk | Agent | Risk |
| Antipsychotics | Miscellaneous | ||
| Chlorpromazine (Thorazine) | low | Lovastatin (Mevacor) | very low |
| Perphenazine (Trilafon) | very low | Levodopa (Dopar) | very low |
| Phenelzine (Nardil) | very low | Aminoglutethimide (Cytadren) | very low |
| Chlorprothixene (Taractan) | very low | Alpha-interferon (Wellferon) | very low |
| Lithium carbonate (Eskalith) | very low | Timolol eye drops (Timoptic) | very low |
| Anticonvulsants | |||
| Phenytoin (Dilantin) | very low | ||
| Carbamazepine (Tegretol) | low | ||
| Trimethadione (Tridone) | very low | ||
| Primidone (Mysoline) | very low | ||
| Ethosuximide (Zarontin) | very low |