Has been associated with CNS toxicity (seizures, psychosis, depression, and confusion). Prolonged use may result in fungal or bacterial superinfection, including C. difficile-associated diarrhea and pseudomembranous colitis. Use with caution in the following cases: history of chronic alcoholism (risk of seizures), depression, severe anxiety, and/or psychosis, renal impairment, history of seizure disorder, potential folate deficiency (malnourished, chronic anticonvulsant therapy, or elderly).