Avanafil is best taken 15-30 minutes before sex. Avanafil is a new type of drug for the treatment of sexual dysfunction, and it works quickly after taking the drug, and the effect can be realized in 15 minutes, so it is best to take the drug 15-30 minutes before sex, so that the drug can be quickly realized. And the drug is metabolized quickly, the action time is relatively short, will not produce serious adverse reactions. When taking Avanafil, it is sufficient to maintain a stable blood pressure level for the past three months, and to start with the smallest effective dose to avoid adverse reactions caused by excessive dosage. Adverse reactions such as headache and nausea may occur with the use of this drug. It should not be used by patients taking nitrate drugs or allergic to this product. Patients who need to use the drug should do so under the supervision of a doctor.