Dreams and Erections

The average male has four to eight spontaneous erections every night while he sleeps. They usually occur during the REM stage, when dreaming is most common.

When a doctor wants to know whether a patient's difficulty achieving an erection is due to physical or mental reasons, one way to find out is to fit the patient's penis with a sensor and see whether or not the patient's dream erections are working properly. If not, the problem is probably physical.

History of Viagra

Viagra was initially developed a heart condition called angina, during the testing period for this drug it was found to give an erection to men. The drug was patented in 1996, approved in 1998 making viagra the first official drug to treat erection problems and being made available for sale later that year. The success of this drug is over whelming. You can get viagra on perscription from your doctors or on numerous websites after consultation (a mere questionaire). The fact is, it has improved the sex lives of millions men and women around the world. Annual sales of Viagra in the period 1999 - 2001 exceeded .750,000,000.

It was first thought that Viagra would lead to a drop in the market for traditional remedies which came from specific body parts of endangered species. This is highly unlikely as the traditional remedies is a treatment not just for erectile dificinency e.g. the Rhinoceros horns are used for high fever. Further on it is unclear that natural remedies will be able to compete with Viagra, due to its aphrodisiac properties.

Since Viagra's release, there has been an increase in 'fake viargra' being sold on the interne which looks like viagra (blue diamond pill) will the companies name, Pfizer engraved on it. These have proven to be dangerous and you must be careful where you buy viagra. Check out our purchasing viagra guide.

Pfizer's worldwide patents on Viagra will expire in 2011 - 2013. The UK patent held by Pfizer on the use of Viagra as treatment of impotence has been invalidated in 2000 because of obviousness; this decision was upheld on appeal in 2002.