Sildenafil is a drug for the gentlemen who are having a problem obtaining and maintaining an erection. It is commonly known as Viagra. Many jokes are out there about Viagra but to the man with the problem of erectile dysfunction it is not a joking matter. The drug is used to reduce pulmonary arterial hypertension (PAH) and is used for altitude sickness also.

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Viagra recreational use
Recently Sildenafil has become popular in Australia and New Zealand with young adults as a recreational drug because of its ability to increase the libido and improve sexual performance as well as permanently increasing penis size.
It has also been discovered by Argentinean scientists to reduce the “jet lag recovery in hamsters”!
Professional athletes have used sildenafil to open their blood vessels in their muscles and thus hopefully improve their performance.

Viagra works
The action of Sildenafil is that of a vasodilator, that is it dilates the blood vessels to allow increased blood flow to the penis, muscles and the lung, thus producing the desired effects. In PAH it allows the patient to breath with more comfort. In erectile dysfunction the blood flow to the penis is increased which makes the penis increase in size and the ability to remain erect longer.

Viagra for women
Women can also take Sildenafil to increase their libido.

History
Sildenafil was developed by British scientists and is now produced by the Pfizer Pharmaceutical Company. It comes in the form of a “little blue pill”.

Viagra and herbal medicines
The physician prescribing Sildenafil for you should be aware of you medical history and if you have any problems with smoking, if you take St John’s Wort, have a history of heart problems or high blood pressure, liver or kidney diseases and if you are pregnant or trying to become pregnant. Your doctor should also be aware of all medications you take including over the counter medications and herbal supplements as well as any “street” drugs you may be using.

Side effects
Side effects of Sildenafil include heartburn, diarrhea flushing, nosebleeds, difficulty falling or staying asleep, muscle aches and numbness, burning or tingling in the arms, hands and feet.

Serious side effects that need to be reported to your Doctor immediately are sudden severe loss of vision, blurred vision, sudden decrease or loss of hearing, ringing in the ears, erections that is painful or lasts more than four hours, fainting, chest pain, shortness of breath, rash and itching or burning during urinations.

Dosages
Sildenafil is produced in 25 mg, 50 m, and 100mg tablets. It is to be taken 30 minutes to 4 hours before sexual intercourse. It is not to be taken more than once a day.

John Rogers

I am General practitioner (GP) in Melbourne since 2006.