Avanafil is used to diagnose men who have erectile dysfunction disease (also known as sexual impotence). Avanafil drugs belong to a group of medicines known as phosphodiesterase 5 (PDE5) inhibitors. These medicines stop an enzyme called phosphodiesterase type-5 from function too fast. The penis is one of the parts where this enzyme acts. Erectile dysfunction is a condition or situation where the penis does not harden and expand at the time of sexual intercourse , or when he cannot keep an erection. When a person is sexually stimulated, his body’s normal response is to increase blood supply to his penis to generate an erection. By stopping or controlling the enzyme, avanafil drug helps to maintain an erection after the penis is stroked by increasing blood supply to the penis. Without physical function to the penis, such as that occurring at the time of sexual intercourse, avanafil drugs will not act to cause an erection. This drug is available only with your physician recommendation or prescription. This product is only available in the forms of Tablets.