Sildenafil or the Blue Pill as we know it is the brainchild of pharmaceutical giant Pfizer. This drug is also sold under different brand and generic names, depending on the company it was manufactured by under the license. However, most users have heard about the Blue Pill that is widely advertised on the Internet unlike most other drugs of its kind. Sure, there are other medications that compete with Sildenafil such as Levitra and Cialis. However, Pfizer's drug was the first to be so aggressively advertised as the Blue Pill, and the company pays good commissions for online vendors to promote this drug through different means. That's why almost any online drugstore offers Sildenafil at a very good price and there's no problem ordering this drug online.

Sildenafil is widely known as Viagra for most users and online shoppers. The main purpose of this drug is to treat erectile dysfunction in men. However, before it has become the first and the biggest drug for treating impotence, it was studied as a treatment for chest pain. It was during the clinical trials that the researchers have observed the amazing effect of Sildenafil, as male test subjects reported improvement in their erectile functions. Even those who were diagnosed as impotent have told that they experienced erections after taking the test drug. That's how Pfizer got ahead in the race for the first male impotence treatment - by accident.

Viagra works by stimulating the blood flow into the penis, which results in harder and more durable erections. If being more specific, it blocks the PDE-5 enzyme which is responsible for returning the penis into its flaccid state after ejaculation. When there are initial problems with blood flow, this enzyme makes it impossible to achieve a firm erection and it needs to be blocked in order to allow strong erection to form. That's what Sildenafil is used for.

Viagra was introduced to the market in 1998 and approved by the FDA the same year. So it was the first medication to be approved for treating erectile dysfunction in men and got well ahead its closes competitors. Cialis and Levitra were introduced only in 2003, so the Blue Pill had five years to make a market and conquer it. And it did. Moreover, Pfizer's product was the first drug to be so aggressively advertised on the web and it has literally created the entire industry of online drugstores we have today. So it's really hard to underestimate the impact and importance of Sildenafil for the current online pharmaceutical industry.

Until now, Pfizer's product is ranked number one in sales volumes and income earned among medications for male impotence, despite the fact that there are more identical drugs penetrating the market each year. It is estimated that within the first two years after it has been available for sale, Sildenafil has earned Pfizer over $1 billion in clean income and you can imagine how many men were buying the drug back then. Today most men still prefer the Blue Pill over its competitors because it is a legendary name that made its way even into popular culture.