Erectile dysfunction, in short, is the inability to get or maintain an erection long enough for intercourse. Impotence or erectile dysfunction often has a negative effect on sex life, and can cause additional stress, depression, and low self-esteem. Conditions that affect the heart and its ability to pump blood well can cause impotence. Without enough blood flow to the penis, a person can’t achieve an erection. Atherosclerosis, a condition that causes the blood vessels to become clogged, can cause impotence. High cholesterol and high blood pressure (hypertension) are also associated with increased risks for impotence. If a person has emotional disorder , the person might not be able to achieve the desired erection. Overview Viagra is the first oral ED pill. Its generic name is Sildenafil and has Sildenafil citrate as an active component. People have been ordering Viagra since its FDA approval in 1998. The users of Viagra have reported long, happy sessions with th