The generic name of Viagra is sildenafil citrate, and alcohol should not be consumed 2 hours after the medication to avoid adverse reactions, and it should be consumed at least 24 hours later. Sildenafil citrate is clinically used for the treatment of erectile dysfunction in men, this drug dilates the patient’s blood vessels and lowers blood pressure, and alcohol also has a vasodilating effect, so drinking alcohol after taking the drug will increase the incidence of adverse reactions such as dizziness, headache, and low blood pressure. It takes 24 hours to metabolize this product, so it is recommended that alcohol be consumed at least 24 hours after administration. Adverse effects of taking sildenafil citrate include headache, dizziness, dyspepsia, rash, visual abnormalities, myalgia, back pain, etc. It is contraindicated for those who are allergic to this drug and it should not be used in combination with nitrate drugs. It is recommended to use the drug under the supervision of a physician, and do not drink alcohol within 24 hours after taking the drug.