Avanafil, also known as Avanafil Tablets in China, is clinically used to treat erectile dysfunction in men. Avanafil tablets is a selective type 5 phosphodiesterase inhibitor, clinically mainly used for men with erectile dysfunction, after the use of the drug through sexual stimulation can make the penis erect. Common adverse reactions are headache, flushing, muscle pain, rare adverse reactions are constipation, dyspnea, bronchitis, nausea, rash and so on. It is prohibited for those who are allergic to the drug, prohibited for women, prohibited for patients who are taking nitrate drugs, and prohibited for use under the age of 18. Drugs need to be selected and used under the guidance of a professional doctor to avoid abusing the drug by yourself to avoid adverse reactions.