Viagra.

Viagra (sildenafil) is supposed to be used only by men that have ED (erectile dysfunction). This medicine works by stimulating more powerful blood flow to the tissues of the penis therefore making it possible to get and maintain a hard erection. It's important for you to take this medicine after you have discussed everything with a qualified health care professional. The following medical conditions must be discussed before you start using Viagra: liver disease, sickle cell anemia, coronary artery disease, leukemia, bleeding disorder, stomach ulcer, low blood pressure, kidney disease, a recent history of heart attack, stroke, or heart rhythm disorder, multiple myeloma, high blood pressure, congestive heart failure, heart disease, retinitis pigmentosa, and heart rhythm problems. The conditions mentioned may require dose adjustment – your doctor may actually start you on a lower dose to make sure you benefit from using Viagra without getting any serious side effects. There is no need to worry if you get upset stomach, back pain, memory problems, stuffy nose, warmth or redness in your face or chest, or headache, as those mild side effects are short-lived.