Viagra

Viagra (sildenafil) is a medicine widely used for the treatment or erectile dysfunction. This condition can be caused by a variety of factors, both physical and psychological, and is characterized by an inability of the patient to achieve erections that would be hard enough to have sex. Viagra is one of the most recognizable brands in the world and millions of men have already experienced its effects. To make sure you will get maximum benefits of the treatment you will need to listen very carefully to the instructions your health care provider gave, including those about your dose, dosing schedule and side effects that can be prevented. Make sure you always take the exact dose prescribed, even though you have been started on the lowest dose possible – 25 mg. Your dose can be later increase if it is safe. The following health conditions can affect the dose you are prescribed and require additional tests to be done: retinitis pigmentosa, coronary artery disease, heart rhythm problems, kidney disease, a history of a heart attack, heart disease, physical deformity of the penis, liver disease, bleeding disorder, high or low blood pressure, stomach ulcer, a history of a stroke, heart rhythm disorder, congestive heart failure, and some blood cell disorder.