The generic name of Sildenafil is Sildenafil Citrate and the side effects mainly include headache, dizziness, indigestion, visual abnormalities, etc. The level of discomfort may vary from person to person and cannot be generalized. Sildenafil Citrate is mainly used clinically to treat erectile dysfunction in men. After applying the drug, side effects such as headache, dizziness, flushing, diarrhea, nasal congestion, myalgia, dyspepsia, and visual abnormalities may occur. There are individual differences in different patients and the extent of side effects varies somewhat. Contraindications for sildenafil citrate include prohibition of hypersensitivity to the product and any of the ingredients in the product; during the application of the product, no concomitant application of guanylate cyclase agonists, nitrates and other drugs. It should be noted that the existence of serious cardiovascular and cerebrovascular diseases, should not have sex, should not apply this drug; the last six months of shock, heart failure and other conditions, should not apply this drug; pigmented retinitis patients, sickle cell anemia patients, should not apply this drug. If you need to use this drug, you must follow the doctor’s instructions. If any discomfort occurs after the use of this drug, it should be treated by a doctor in a timely manner.