Drugs that can cause symptoms of Delirium

• Antibiotics
• Anticancer drugs, including methotrexate and procarbazine
• Anticholinergics, including atropine, scopolamine, chlorpromazine (an antipsychotic), and diphenhydramine (an antihistamine)
• Anticonvulsant drugs
• Antidepressant drugs
• Cimetidine
• Corticosteriods, including prednisone
• L-dopa
• Lithium
• Nonsteroidal anti-inflammatory drugs (NSAIDs), including ibuprofen and acetaminophen
• Sedatives, including barbiturates, benzodiazepines, and ethanol (drinking alcohol)

*these have very low anticholinergic side effects, but effects are cumulative