Sildenafil citrate, known worldwide by the brand name Viagra, is a wonder drug that is used mainly for the treatment of erectile dysfunction and even pulmonary arterial hypertension. Sildenafil citrate was originally conceptualized and developed by scientists in Great Britain, and it was then marketed by Pfizer, a pharmaceutical company located in the United States. Sildenafil citrate is called Revatio, and it is intended for patients with pulmonary arterial hypertension.
Just like some medicines that were made initially for another purpose, sildenafil citrate was originally studied for use in patients suffering from high blood pressure (hypertension) and angina pectoris (a common symptom in ischaemic heart disease patients). The first clinical tests have shown that sildenafil citrate had minimal improvements on angina; however, it resulted to a remarkable instance of penile erections. Due to this, Pfizer had decided that they will market sildenafil citrate to the public for treatment of erectile dysfunction issues, rather than the original idea of having it treat angina.
In 1996, sildenafil citrate was patented and then it was approved by the FDA on March 1998. Sildenafil citrate was the very first oral medication that is FDA approved for treating erectile dysfunction in the US. After that, sildenafil citrate (under the brand name Viagra) sales have been very successful, and it reached a whopping $1,934 million in annual sales during 2008.
Even if sildenafil citrate is available via prescription from a physician, it was made sensational because it was advertised to consumers directly on US TV, and it was endorsed by football star Pele and former US senator Bob Dole. Because of its extreme popularity, sildenafil citrate was also informally called as “the Blue Bill”, “Vitamin V”, the “Blue Diamond” aside from its brand name Viagra.
These days, thanks to the ease of online shopping, you can now buy sildenafil citrate without having to go to the local pharmacy store and endure the embarrassing situation of having others know about your erectile dysfunction problems. A lot of people typically buy sildenafil citrate online by the simple reason that they do not like to go out of the house and fall in line at the store just to buy medicine. Others love the fact that they can buy sildenafil citrate online and get nice discounts or freebies from generous online pharmacies.
In many countries, sildenafil citrate is available as generic Viagra, and Pfizer’s patent does not apply to them such as in India, Brazil, Austria, Spain, Sweden, UK, Denmark, France, Ireland, Italy, China, etc.
Of course, just like any other medication, sildenafil citrate can give you unwanted side effects. If you are someone who is taking drugs containing nitric oxides, nitrites, nitrates, and things like that, then you must not take sildenafil citrate with them. If you have heart problems, then sildenafil citrate might not be the right medicine for you. If you have decreased liver function, low blood pressure, renal impairment, retinal disorders, or a recent case of heart attack or stroke, then you must not take sildenafil citrate as it will give you very nasty side effects that can be detrimental to your health or even fatal.