Drowsiness; irritability, insomnia, somnolence, fatigue, dry mouth, pharyngitis, dizziness, headache, abdominal pain, cough, diarrhea, epistaxis, bronchospasm, nausea & vomiting, hypersensitivity manifested by urticarial & fixed drug eruptions, nervousness, rashes, anaphylactic shock, aggression, hallucination, dysgeusia, dyskinesia, dystonia, memory impairment, syncope, tremor, eye pain/swelling, blurred vision, abnormal hepatic function, pruritus, urticaria, acute generalized exanthematous pustulosis, arthralgia, enuresis, urinary retention, erectile dysfunction, malaise, abnormal feeling, pruritus upon w/drawal, increased wt. Autoimmune-mediated hepatotoxicity (possible to develop). Life-threatening hepatitis w/ long-term treatment.