Sildenafil Citrate is the main ingredient in Viagra, made by the multi-million dollar corporation Pfizer. Although used mainly for the treatment of erectile dysfunction, Viagra was first created as an attempt at a treatment for Angina. After the trial period, scientists realized that Viagra had some interesting effects on the volunteers, and therefore began testing it to treat erectile dysfunction. Sildenafil citrate works by inhibiting the enzyme phosphodiesterase type 5 (PDE5) which in turn relaxes the smooth muscles of arteries in the lower regions of the body. In the case of erectile dysfunction, this allows blood to enter the penis and stay there, leading men to have successful erections.

Following this, some scientists began testing sildenafil citrate’s effect on people with hypertension and more interesting discoveries were made. Studies on people with pulmonary arterial hypertension (PAH) found many benefits in the use of sildenafil. After copious exercise, patients with PAH using sildenafil found it easier to breath, also finding that they were able to exercise for longer periods of time without losing their breath. The results were so successful that Pfizer then decided to market sildenafil in 20 mg doses as Revatio, to be taken up to 3 times a day by PAH patients.

The possibilities of sildenafil started seeming endless when other findings were made by doctors. Sildenafil could also be used as a treatment for altitude sickness, a condition that in high altitudes comes about as a result of increased pressure and constriction of blood vessels. Sildenafil relaxes blood vessels allowing blood to flow more freely. Some athletes have also found benefits in sildenafil for this same reason, including mountaineers. For example in high places like Mt. Everest people can develop PAH. Now, some scientists are discovering that sildenafil might not just work for men but also may help certain women during pregnancy as they can also develop hypertension which in some cases can lead to preeclampsia, the leading cause of maternal mortality across the world. Other studies found that it may also help women with recurring miscarriages as it has been shown to thicken the endometrial lining.

More than ten years have gone by since Viagra first came into the market and since then not only is it possible to buy Viagra online, but its also easy to find cheap generic Viagra, bypassing the high prices that Pfizer charges as a result of the patent they hold. There are several pharmacies online that facilitate online purchasing and cheap generic Viagra can be found in a great variety of formats going from regular tablets, to soft tabs to even jelly that comes in several different flavors. Pfizer can charge from $10 up to $30 USD for a single pill while cheap generic Viagra can be found for much lower prices. Additionally, online pharmacies can sell sildenafil in bulk, thereby lowering the unitary cost of each pill down to prices as low as $3 USD. Viagra is usually prescribed initially at doses of 50 mg and patients can then either lower or increase their doses based on the results they experience. If you are thinking of purchasing sildenafil citrate, make sure you talk to your doctor to evaluate all the treatments that are available to you before you buy Viagra online.

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