This medication is widely used for the treatment of erectile dysfunction. The active substance in Viagra is sildenafil citrate. Viagra is available in tablet form in doses of 25mg, 50mg and 100mg.
How does this drug work?
You cannot obtain Viagra without a doctor's script. Only men are to use this drug. Viagra must not be used by children or women. The active substance, sildenafil citrate, helps blood to flow into a man's penis to assist him in achieving an erection when he is sexually stimulated. Therefore Viagra enables a man to participate in sexual intercourse.
What is the recommended dose?
Usually, the recommended dose is 50mg which must be taken roughly an hour before the man becomes sexually aroused. (Some men may need to take the dose 4 hours before sexual arousal). If the 50mg dose does not work effectively, a doctor might boost the dose up to 100mg. Viagra can only be used once a day. You must never alter the dosage unless your doctor has agreed.
If you miss a dose
Viagra is only used when needed, so a missed dose is not applicable.
Warnings and Precautions
Viagra cannot be used by men who have been told by their doctor not to engage in sexual activity. Likewise, men who have previously suffered any kind of heart related problem should discuss all the risks of Viagra with a doctor.
Men who have suffered with irregular heart beat or men who have suffered with a stroke in the last six months must use this drug with extreme caution.
Men who suffer with low blood pressure (90/50) or high blood pressure (170/110) must be very cautious about using Viagra.
Men who have suffered with heart disease, cardiac failure or unstable angina should use this drug with extreme caution.
Any man who has a genetic eye disorder called retinitis pigmentosa must use this drug with caution.
There have been reports of men having a prolonged erection after taking Viagra. This should be immediately reported to a doctor. If not, there may be serious damage to the penis, and permanent impotence may result.
Any man who is taking alpha-blockers is advised to use Viagra cautiously.
You will need to give your doctor full details about your medical history. This includes details of all other medications that you may be using. If you are using a vitamin supplement or an herbal remedy, or any other over-the-counter medication, tell your doctor about these as well.
Does Viagra have side effects?
Viagra is not known to have any serious side effects. Temporary side effects include vision problems, dizziness, nasal congestion, rash, urinary tract infection, diarrhea, headache, flushing of the face, or stomach irritations. If any of these symptoms do not disappear after a short while speak to a doctor.
Overdose
There have not been any reports of overdose with Viagra. However, if too much has been taken, contact an emergency medical center.
Storage instructions
Always keep Viagra in a cool place away from sunlight and moisture.
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