Depression; sedation, somnolence, ataxia, memory impairment, dysarthria, dizziness, headache; constipation, dry mouth; fatigue, irritability. Decreased appetite; confusional state, disorientation, libido changes, anxiety, insomnia, nervousness; balance disorder, abnormal coordination, attention disturbance, hypersomnia, lethargy, tremor; blurred vision; nausea; dermatitis; sexual dysfunction; increased/decreased wt.