Viagra (Sildenafil) is used to treat male sexual function problems (impotence or
erective dysfunction) by blocking a certain enzyme (phosphodiesterase-PDE5) in the body. In combination with sexual stimulation, Viagra works by helping the blood flow into the penis to achieve and maintain an erection. Viagra is not indicated for use in women. Use of Viagra does not protect against sexually transmitted diseases (e.g., HIV, hepatitis B, gonorrhea, syphilis). Practice "safe sex" such as using latex condoms. Consult your doctor or pharmacist for more details.
HOW TO USE
Viagra is taken by mouth as needed, at least 30 minutes, but no more than 4 hours, before sexual activity (1 hour before is the most effective). Do not take more often than once daily, and take as directed. A high fat meal may delay the time of onset of Viagra. Avoid eating grapefruit or drinking grapefruit juice while you are being treated with Viagra unless your doctor instructs you otherwise. The dosage is based on your medical condition, response to therapy, and other medications you may be taking (see also Drug Interactions section). Consult your doctor or pharmacist for more details.
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