The generic name of Viagra is sildenafil citrate tablets, and this product should not be taken one hour after drinking alcohol. One hour after drinking alcohol, alcohol in the body is not completely metabolized out of the body, and the body still has ethanol, if you take sildenafil citrate tablets at this time, it may cause adverse reactions. And after drinking alcohol may prompt the human body blood vessels in a dilated state, the spongy body of the penis will also be congested, at this time to take sildenafil citrate tablets, may lead to excessive erection of the penis, the spongy body is overcongested. Some patients using Sildenafil Citrate Tablets may experience adverse reactions such as dizziness and headache, vision loss. The drug is forbidden to be used in combination with nitrate drugs, and it is contraindicated for women, people who are allergic to the product, children, and people whose recent cardiovascular state makes them unfit for sexual intercourse. Patients taking sildenafil citrate tablets should consult a doctor before using the drug and take it under his or her guidance, do not take it blindly on your own.