Avana 50 mg is a medication that contains the active ingredient avanafil. It is primarily used to treat erectile dysfunction (ED) in men. Avanafil is a phosphodiesterase type 5 (PDE5) inhibitor, similar to sildenafil (Viagra) and tadalafil (Cialis). Like other PDE5 inhibitors, Avana 100 mg works by increasing blood flow to the penis, allowing men to achieve and maintain an erection when sexually stimulated.