The correct name of Sildenafil is usually Sildenafil Citrate Tablets, which is generally not recommended for normal people, and those who have indications for the use of the drug can use the drug as prescribed by the doctor. Sildenafil citrate tablets are commonly used in the treatment of erectile dysfunction of the penis, need to have an indication to use, so it is not recommended for normal people. Note that the drug should be contraindicated in people who are allergic to the product, people who take guanylate cyclase agonists (such as liothyronine), and people who take nitric oxide donors (such as organic nitrates or nitrites). Common adverse drug reactions in users after use include back pain, abnormal vision, nasal congestion, nausea, headache, dizziness, myalgia, hot flashes, dyspepsia, and rash. Matters relating to the specific use of the drug should be directed by a physician and should not be used without authorization.