Headache, somnolence; nausea, dry mouth. Decreased appetite; insomnia, agitation, decreased libido, anxiety, abnormal orgasm & dreams; dizziness, lethargy, tremor, paraesthesia; blurred vision; tinnitus; palpitations; increased BP, flushing; yawning; constipation, diarrhoea, abdominal pain, vomiting, dyspepsia, flatulence; increased sweating, rash; musculoskeletal pain, muscle spasm; dysuria, pollakiuria; erectile dysfunction, ejaculation disorder; falls, fatigue; decreased wt.