Somnolence, insomnia; nausea; ejaculation disorder. Fatigue, dizziness, abnormal dreaming, lethargy, yawn; anorgasmia, menstrual disorder; xerostomia, diarrhea, constipation, decreased appetite, indigestion, vomiting, abdominal pain; impotence; neck/shoulder pain, paresthesia; rhinitis, sinusitis.