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Sildenafil Citrate (Cas No.139755-83-2)
USES: Sildenafil is used to treat male sexual function problems
(impotence or erectile dysfunction) by blocking a certain enzyme
(phosphodiesterase-PDE5) in the body. In combination with sexual
stimulation, sildenafil works by helping the blood flow into the penis to
achieve and maintain an erection.
This drug is not indicated for use in women.
Use of this drug 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: Read the Patient Information Leaflet provided by your
pharmacist before you start taking sildenafil and each time you get a
refill. If you have any questions, consult your doctor or pharmacist.
This drug 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 this drug.
SIDE EFFECTS: Headache, flushing, stomach upset, heartburn, nasal
stuffiness, diarrhea, dizziness, or lightheadedness may occur. Vision
changes such as increased sensitivity to light, blurred vision, or impaired
blue/green color discrimination may also occur. If any of these effects
persist or worsen, notify your doctor or pharmacist promptly.
Remember that your doctor has prescribed this medication because he or she
has judged that the benefit to you is greater than the risk of side effects.
Many people using this medication do not have serious side effects.
Rarely, a sudden loss of eyesight in one or both eyes (NAION) may occur.
This may or may not be due to sildenafil. If this serious problem occurs,
seek immediate medical attention. You have a slightly greater chance of
developing this serious eye problem if you have heart disease, diabetes,
high cholesterol, certain eye problems ("crowded disk"), high blood
pressure, are over 50 years of age, or if you smoke.
PRECAUTIONS: Before taking sildenafil, tell your doctor or pharmacist
if you are allergic to it; or if you have any other allergies.
Before using this medication, tell your doctor or pharmacist your medical
history, especially of: penis conditions (e.g., angulation,
fibrosis/scarring, Peyronie's disease), history of painful/prolonged
erection (priapism), sickle cell anemia, blood system cancers (e.g.,
leukemia or myeloma), eye problems (e.g., retina diseases like retinitis
pigmentosa), kidney disease, liver disease, bleeding disorders, active
stomach ulcers, heart problems (e.g., recent heart attack or serious
arrhythmia within past 6 months, heart failure, coronary artery disease with
unstable angina, aortic stenosis, idiopathic hypertrophic subaortic stenosis),
recent stroke within past 6 months, very high or low blood pressure.
This drug may make you dizzy or cause vision changes; use caution engaging
in activities requiring alertness such as driving or using machinery. Limit
MISSED DOSE: Not applicable.
STORAGE: Store at room temperature at 77 degrees F (25 degrees C)
away from light and moisture.