In the questionnaire, scores for the question on how often the patient was able to achieve intercourse went from about 2 without treatment to 3 or 4 with Viagra 50 mg. Before starting, stopping, or changing any medications while taking sildenafil, please get the advice of your doctor or pharmacist. Ask your pharmacist for a list of the ingredients. For the full list of all side effects reported with Viagra, see the package leaflet. Follow the manufacturer’s directions to use and clean the oral syringe. If you experience chest pain, dizziness, or nausea during sexual activity, call your doctor immediately and avoid sexual activity until your doctor tells you otherwise.Pfizer has announced that from today, VIAGRA connect is available to purchase without a prescription from pharmacies in the UK. It will be available in pharmacy and online from Boots exclusively for a two-week period, prior to being made available from wider pharmacies. Its introduction has been hailed as an important step forwards in. 1. How it works Sildenafil may be used to treat erectile dysfunction (ED or impotence) in men (Viagra brand) or pulmonary arterial hypertension in both men and women (Revatio . Sildenafil (Viagra) is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Sildenafil (Liqrev, Revatio) is used to improve the ability to exercise in adults (Liqrev, Revatio) and children 1 year of age and older (Revatio) with pulmonary arterial hypertension (PAH; high blood pressure in the vessels carrying blood to the .