Avanafil is used to treat erectile dysfunction (ED: impotence; inability to get or keep an erection in men). Avanafil is in a class of medications called phosphodiesterase (PDE) inhibitors. It works by increasing blood flow to the penis during sexual stimulation. This increased blood flow can cause an erection. Avanafil is known by the trademark names Stendra and Spedra. Avanafil dosages comes in 50mg, 100mg and 200mg. We Ship Worlwide and Door To Door Delivery.