Pfizer’s Viagra patents have already expired in several other countries. Last month, an over-the-counter version of the drug (manufactured by Pfizer) was cleared by . regulators. Pfizer has reached settlements with companies like Teva, which are producing their own generic Viagra versions, to allow for those treatments to enter the market. The company is now trying to hang on to as many sales as possible from the lucrative treatment, which has been around for decades.
Viagra – the little blue pill recognised across the world – has changed the face of erectile dysfunction treatment since its market release by Pfizer in 1998. With its relatively few side effects, ease of use and its effectiveness, it is little wonder the drug has become so popular.