British researchers were testing a drug intended for use in controlling pulmonary arterial hypertension (PAH) and were somewhat surprised when the male participants reported improved sexual performance. Yet, when they came to analyze the results, the scientists realized the effect they were intending for the major artery through the chest was actually occurring in the penis. A redrawn clinical trial confirmed the results and, as the idiom says, the rest was history. As an aside, the work to develop an effective treatment for PAH continued and a different version of the viagra is now sold as Revatio and dilates the pulmonary artery, reducing blood pressure and avoiding the risk of angina. A further use has also been developed in the treatment of altitude sickness where it is not possible for the person affected to be brought down the mountain quickly enough.

viagra format variations

Because cultures can differ on the best way to deliver medication, Pfizer has been working on producing Viagra in a number of different formats. The basic chemistry stays the same, but trying to sell it as a pill is never going to be a success in overseas markets. So, for example, you can buy it as a capsule, a soluble pill and powder, a melt-in-the-mouth tablet, a liquid you can drink on its own or added to something to improve the taste, a patch to stick on your skin, a gel to rub on to the penis, and so on. The only difference is in the speed with which the chemicals get into the bloodstream. As a pill, it takes time to dissolve. A liquid becomes active more quickly.