drowsiness, tremor,
fatigue, diarrhea, dyspepsia, nausea, insomnia, loose stools, dizziness, headache, paresthesia, delayed ejaculation, ejaculation failure, xerostomia, anorexia, diaphoresis, and decreased libido. Other side effects include: agitation, pain, vomiting, abdominal pain, anxiety, hypouricemia, and malaise. See below for a comprehensive list of adverse effects.