antidepressants, phenothiazines, atropinics, OTC sleep preparations), alcohols, anticonvulsants, carbon monoxide, salicylates, organophosphate insecticides, clonidine, γ-hydroxybutyrate Delirium/psychosis Alcohol, phenothiazines, drugs of abuse (phencyclidine, LSD, peyote, mescaline, marijuana, cocaine, heroin, MDMA, designer drugs), sympathomimetics and anticholinergics (including prescription and OTC cold remedies), steroids, heavy metals, dextromethorphan Convulsions Alcohol, amphetamines, cocaine, phenothiazines, antidepressants (particularly bupropion and tricyclics), antihistamines, camphor, boric acid, lead, organophosphates, isoniazid, salicylates, plants (water hemlock), lindane, lidocaine, phencyclidine, carbamazepine, theophylline, caffeine Ataxia Alcohol, barbiturates, benzodiazepines, carbon monoxide, anticonvulsants, heavy metals, organic solvents, sedative-hypnotics, hydrocarbons Paralysis Botulism, heavy metals, plants (poison hemlock), ticks, paralytic shellfish poisoning Eyes Pupils Miosis Opioids, organophosphates, ethanol, barbiturates, phenothiazines, phencyclidine, clonidine Mydriasis Amphetamines, anticholinergic agents, barbiturates (if comatose), botulism, cocaine, methanol, glutethimide, LSD, marijuana, phencyclidine, antihistamines, antidepressants Nystagmus Phenytoin, sedative-hypnotics, carbamazepine, glutethimide, phencyclidine (both vertical and horizontal), barbiturates, ethanol, MAOIs, ketamine, dextromethorphan Skin