Insomnia; dyskinesia, somnolence, dizziness, headache, PD; cataract; orthostatic hypotension; nausea; fall. Serious adverse reactions in concomitant use w/ SSRIs, SNRIs, TCAs & MAOIs: Hypertensive crisis (high BP, collapse), NMS (confusion, sweating, muscle rigidity, hyperthermia, increased creatine phosphokinase), serotonin syndrome (confusion, HTN, muscle stiffness, hallucinations), & hypotension.