Cardiovascular drugs	Antiparkinsonian drugs	Anti-inflammatory/anti-infective agents	Stimulants
Clonidine (Catapres) Digitalis Guanethidine (Ismelin) Hydralazine (Apresoline) Methyldopa (Aldomet) Procainamide (Pronestyl) Propranolol (Inderal) Reserpine (Serpasil) Thiazide diuretics Chemotherapeutics 6-Azauridine Asparaginase (Elspar) Azathioprine (Imuran) Bleomycin (Blenoxane) Cisplatin (Platinol) Cyclophosphamide (Cytoxan) Doxorubicin (Adriamycin) Mithramycin (Mithracin) Vinblastine (Velban) Vincristine	Amantadine (Symmetrel) Bromocriptine (Parlodel) Levodopa (Larodopa) Antipsychotic drugs Fluphenazine (Prolixin) Haloperidol (Haldol) Sedatives and antianxiety drugs Barbiturates Benzodiazepines Chloral hydrate Ethanol Anticonvulsants Carbamazepine (Tegretol) Ethosuximide (Zarontin) Phenobarbital Phenytoin (Dilantin) Primidone (Mysoline)	Ampicillin Cycloserine (Seromycin) Dapsone Ethambutol (Myambutol) Griseofulvin (Grisactin) Isoniazid (INH) Metoclopramide (Reglan) Metronidazole (Flagyl) Nalidixic acid (NegGram) Nitrofurantoin (Furadantin) Nonsteroidal anti-inflammatory agents Penicillin G procaine Streptomycin Sulfonamides Tetracycline	Amphetamines (withdrawal) Caffeine Cocaine (withdrawal) Methylphenidate (Ritalin) Hormones Adrenocorticotropin Anabolic steroids Glucocorticoids Oral contraceptives Other drugs Choline Cimetidine (Tagamet) Disulfiram (Antabuse) Lecithin Methysergide (Sansert) Phenylephrine (Neo-Synephrine) Physostigmine (Antilirium) Ranitidine (Zantac)