Common side effects (these can affect from 1 to 10 users in 100 patients treated) • Anxiety, having abnormal dreams. • Dizziness, tremor or numbness, including numbness or tingling of the skin. • Being sick (vomiting), heartburn or breaking wind, lack of appetite. • Blurred eyesight. • Feeling the heart pumping in the chest or hot flushes. • Problems getting an erection, changes in orgasm or less sex drive. • (itchy) Rash. • Muscle pain, muscle tightness or muscle spasm.