Viagra generally refers to sildenafil citrate, which is used to treat erectile dysfunction in men as prescribed by the doctor is relatively effective.
Sildenafil citrate in the clinical treatment of erectile dysfunction, usually take the drug before sex, after taking the drug need sexual stimulation to make it effective, can improve the hardness of erection, improve the quality of sexual life.
Taking sildenafil citrate may cause dry mouth, diarrhea, dizziness, headache, rash and other adverse reactions.
It is contraindicated in people who are allergic to the drug; in people who are applying sodium nitroprusside, nitroglycerin or others containing nitrates; and in women with children.Caution should be exercised in patients who have had shock, myocardial infarction, or stroke within 6 months.
Before taking the drug, consult a professional urologist or male doctor and use the drug under his guidance.