The scientific name of Viagra is sildenafil citrate, which is used to treat erectile dysfunction. Sildenafil citrate is the name of a western drug that belongs to the group of phosphodiesterase type 5 inhibitors and is used clinically to treat erectile dysfunction. Some patients may experience adverse reactions such as facial edema, photosensitivity, shock, fatigue, angina, and atrioventricular block while taking sildenafil citrate. It should be noted that it is contraindicated in patients who are allergic to any of the ingredients in this product. Pay more attention during the use of the drug and avoid taking drugs that lower blood pressure to avoid lowering blood pressure. If you need to take sildenafil citrate, you should use the medication under the guidance of a doctor, and you should not take the medication on your own to avoid adverse reactions. For patients with erectile dysfunction, in addition to medication, but also more exercise exercise, psychological treatment.