Sildenafil refers to sildenafil citrate tablets, the main ingredient is sildenafil citrate, clinically mainly used for the treatment of erectile dysfunction in men, for women have no effect, there will be adverse reactions, so women can not eat. Sildenafil citrate tablets may appear during the administration of facial edema, fatigue, pain, angina, fainting, palpitations (rapid heartbeat, often accompanied by panic), vomiting, colitis, gastritis, esophagitis, anemia, gout, arthritis, tenosynovitis, neuralgia, insomnia and depression, urticaria and other adverse reactions. Meanwhile, it is strictly prohibited for patients with recent myocardial infarction, life-threatening arrhythmia, and resting-state hypotension, hypertension, heart failure, and retinitis pigmentosa. In addition to women can not take, newborns and children can not take.