Common side effects, seen in more than 1 in 100 patients but less than 1in 10, include dizziness, giddiness, feeling unusually tired or generally unwell, swelling of the ankles, palpitations, headache, chest pain, sleepiness, muscle cramp, constipation, indigestion, breathlessness, runny nose, delayed ejaculation, frequent urge to pass urine and blurred vision.