Sildenafil Citrate

Sildenafil comes as a tablet to take by mouth. It should be taken as needed about 1 hour before sexual activity. However, sildenafil can be taken anytime from 4 hours to 30 minutes before sexual activity. Sildenafil should not be taken more than once a day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take sildenafil exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.

Although side effects from sildenafil are not common, they can occur. Tell your doctor if any of these symptoms are severe or do not go away:

headache
upset stomach
diarrhea
dizziness or lightheadedness
flushing (feeling of warmth)
nasal congestion (stuffiness)
changes in vision
breast enlargement
If you experience any of the following symptoms, call your doctor immediately:

rash
painful erection
prolonged erection (longer than 4 hours)
fainting
chest pain
itching or burning during urination

In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.

Keep all appointments with your doctor. Sildenafil is not effective in preventing the spread of AIDS or other sexually transmitted diseases.

Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription.

Sildenafil is used to treat impotence in men. Sildenafil increases the body's ability to achieve and maintain an erection during sexual stimulation.