Avanafil should not be used together with nitrate medication, such as nitroglycerin (Nitro Dur, Nitrolingual, Nitrostat, Transderm Nitro, and others), isosorbide dinitrate (Dilatrate, Isordil, Isochron), isosorbide mononitrate (Imdur, ISMO, Monoket), or recreational drugs such as amyl nitrate or nitrite ("poppers"). Taking avanafil with a nitrate medicine for chest pain or heart problems can cause a sudden and serious decrease in blood pressure.

Avanafil relaxes muscles and increases blood flow to particular areas of the body.

Avanafil is used to treat erectile dysfunction (impotence).