Clinically there is no official Avanafil tablets in boxes of eight. The common size of Avanafil tablets is 100 grams 1 tablet, depending on the region and other factors, so the price is not the same, the price of 100 mg 1 tablet pack is about 20 ~ 50 yuan. The price of Avanafil tablets is related to the specifications of the drug, manufacturer, region and other factors, the price is not uniform. The price of Avanafil 100 mg 1 tablet pack is ranging from about 20~50 dollars. Avanafil tablets are mainly used to treat erectile dysfunction in men. Adverse reactions of back pain, headache, nasopharyngitis, nasal congestion, flushing and muscle pain may occur. It is contraindicated in people who are allergic to the product, women, children, and people who are taking nitrate drugs. Avanafil tablets are prescription drugs and should be used under professional medical supervision.