The $15 box of Avanafil is generally only 1 capsule, which can vary depending on the specifications of the drug, the manufacturer and other factors. Avanafil clinically 50mg, 100mg, 200mg per capsule specifications are common, different specifications, different manufacturers, different sales regions and dealers will have differences in price, the current market price per capsule more than 10 ~ 70 yuan. Therefore, the $15 box of Avanafil is mostly 1 capsule. At the same time, the specific price of the drug is recommended to refer to the local hospital price, and go to the regular medical institutions to buy drugs. Meanwhile, it should be noted that Avanafil belongs to the class of phosphodiesterase inhibitors type 5, which is suitable for the treatment of erectile dysfunction in men over 18 years old. However, it is contraindicated in people who are allergic to it or who are using nitrate drugs such as nitroglycerin, and headache, nasal congestion and other adverse reactions may occur during the use of the drug. Therefore, those who have the need to use Avanafil must be under the guidance of a professional doctor to regulate the use of drugs, do not blindly take drugs or increase or decrease the dosage of drugs, so as not to cause adverse consequences.