A group of scientists trying to develop the medicine for controlling pulmonary arterial hypertension (PAH) was lucky to become fathers of a most revolutionary discovery. Men participating the trial reported to big surprise of the doctors nothing more improved sexual performance. On analyzing the results, the researchers were of course disappointed that the effect they expected in the major artery through the chest actually was working in the penis. Redrawn test confirmed the results and the rest was history. Researchers didn’t give up their idea of developing an effective treatment for PAH and working more on the initial substance they got Revatio in the end which is a viagra’s variation successful in dilating the pulmonary artery , normalizing the blood pressure to eliminate angina’s risk. Another revatio’s version is used to treat altitude sickness and quickly bring the sufferers down the mountain.
Format differs but chemistry stays the same
Viagra popularity would perhaps loose positions if Pfizer produced nothing except the pill format. Because of culture differences men on other continents won’t buy the medication in the format whish the Europeans are used to. Another aspect is that not all men can easily swallow tablets because of certain health conditions. So to stay competitive and win more markets viagra developers strated inventing other formats from soluble pills, capsules, or liquid, patches to stick onto the skin, powder and gels for rubbing into the sex organs . It is no doubt that despite the variety of forms the ED keeps the chemistry an this only the speed of taking action with formats to offer more flexibility and convenience.