Viagra.

Viagra (sildenafil) is a medicine intended for male patients suffering from chronic inability to get a stable erection (erectile dysfunction). It is supposed to be taken on the when needed basis and you must never share this medicine with other people to whom it was not prescribed. Inform your doctor of any medical conditions you have that may interfere with the success of your treatment. Tell your health care provider if you have low blood pressure, bleeding disorder, liver disease, kidney disease, stomach ulcer, heart rhythm problems, coronary artery disease, retinitis pigmentosa, a recent history of heart attack, stroke, or heart rhythm disorder, multiple myeloma, heart disease, high blood pressure, sickle cell anemia, leukemia, or congestive heart failure. Some of these conditions will need your doctor to start you on a lower dose, while in other cases you will be monitored for side effects. Side effects of Viagra are not numerous and can include the following symptoms: headache, upset stomach, back pain, memory problems, stuffy nose, warmth or redness in your face or chest. If the side effects mentioned persist and change in intensity – call your doctor about them.