Viagra

Young couple outdoors

About Viagra

Viagra is the most well-known and most widely used anti-impotence drug in the world. It was developed and is manufactured by the pharmaceutical company Pfizer and was launched in 1998. Since then it has been responsible for improvements in the sex lives of millions of men around the globe. It was the first of the drugs, which are known collectively as PDE-5 inhibitors. Cialis and Levitra both come under this heading.

As well as aiding millions men around the world, scientists are discovering new uses for the drug all the time. Its properties as an anti-impotence drug were discovered when Viagra was being tested as a treatment for angina. The increased blood flow to various parts of the body, which is caused by taking Viagra are properties that have been harnessed by the Israeli Air Force and high altitude climbers. Taking a Viagra, it has been discovered, allows more blood to flow to the brain, which in turn means a greater supply of oxygen. This can aid people who need to function at altitudes not normally encountered by the human body.

In the UK Viagra is only available on prescription from a doctor.

How to use Viagra

Viagra is available in three different strengths. These are 25mg, 50 mg and 100 mg. The manufacturer recommends starting on the 50mg dose. The pill should be taken at least half an hour before the commencement of sexual activity to allow it to be absorbed into the blood stream. High fat foods should be avoided when taking the medication as it has been discovered that they can impede the drug from working to its full potential.

Possible Side Effects of Viagra

All prescription medicines may cause some type of side effect. That is the reason that they are licensed and available only from a qualified medical practitioner. Most of the side effects that might be encountered when taking Viagra are mild. The most common are headache, flushing of the face and indigestion. In rare cases Viagra can cause blurred vision and light sensitivity. All the side effects that may be encountered usually go away a few hours after taking the tablet.

Drug Interactions

It is not safe to take Viagra with any medicine that contains nitrates. This also included amyl nitrate (or poppers as they are more commonly known). Combined with Viagra nitrates can cause a dangerous drop in blood pressure, which can be fatal.