Asthenia/fatigue, chills; HTN, vasodilatation, palpitations; decreased appetite, constipation, nausea, vomiting; increased serum cholesterol (particularly w/ prolonged administration & possibly w/ high doses), wt loss; headache; abnormal dreams, decreased libido, dizziness, dry mouth, increased muscle tonus, insomnia, nervousness, paresthesia, sedation, tremor, confusion, depersonalisation; yawning; sweating (including night sweats); accommodation abnormality, mydriasis, visual disturbance; abnormal ejaculation/orgasm (males), anorgasmia, erectile dysfunction, impaired urination, menstrual disorders associated w/ menorrhagia, metrorrhagia, increased urinary frequency.