Viagra.

Viagra (sildenafil) has been created to help men diagnosed with impotence to regain their sexual power and complete sexual intercourse successfully. You need to take this drug exactly as recommended without exceeding the dose you have been prescribed. Tell your doctor if you have diabetes, blood circulation problems, blood cell problems, heart, kidney, or liver disease, stroke, high cholesterol, bleeding disorder, irregular heartbeat, stomach ulcer, chest pain, heart attack, high or low blood pressure, pulmonary veno-occlusive disease, or any conditions affecting the shape of the penis, as those factors may be important in determining your dose. Viagra should be taken 30 to 60 minutes before having sex. You need sexual stimulation to get an erection – this drug is not going to give you an instant erection. Tell your doctor if you develop any of the following rare but serious side effects: shortness of breath, fainting, chest pain, blurred vision, dizziness, priapism, ringing in ears, rash, loss of hearing, sudden severe loss of vision, itching or burning during urination, or lightheadedness. They may mean you need to revise your treatment.