Sildenafil citrate tablets are effective in the treatment of erectile dysfunction, but some patients may have adverse reactions such as facial edema and migraine after using the drug. Patients with erectile dysfunction treated with sildenafil citrate tablets have some efficacy, but some patients with sildenafil citrate tablets may have adverse reactions such as facial edema, migraine, angina pectoris, atrioventricular block, syncope, tachycardia, hypotension, heart failure, vomiting, thirst, arthritis, myalgia, osteodynia, neuralgia, depression, insomnia, asthma, urticaria and other adverse reactions. Sildenafil is forbidden to be used in combination with nitrate drugs, and this drug is contraindicated in women, people who are allergic to this product, children, and people whose recent cardiovascular status makes them unfit for sexual intercourse. It is recommended that patients need to take sildenafil citrate tablets under the guidance of a doctor.