VIAGRA

In 1998, Pfizer Pharmaceuticals obtained FDA approval for the distribution of the first drug for the treatment of impotence in pill form under the brand name Viagra.

The standard doses vary between 50-100mg.

The tablet should be taken about one hour before any expected sexual activity and once the effect is achieved, it should last for up to five hours.

The most common side effects are headaches and sudden flushing or blushing of the face or neck. In some cases, there can also be a slight distortion of color vision so that people cannot distinguish between blue and green.

The tablets can be safely taken on an empty stomach.

Because it has been in the market longer, it is better known and more often sold at a discounted price.

LEVITRA

Bayer gained FDA approval for Levitra in 2003.

The standard doses vary between 2.5-20mg.

The tablet should be taken only when needed and then about twenty-five to forty-five minutes before any expected sexual activity and once the effect is achieved, it should last for up to six hours.

The most common side effects are headaches and sudden flushing or blushing of the face or neck.

There are no requirements or limitations affecting eating or drinking.

Despite the fact that the quality and satisfaction felt during sexual activity is essentially subjective and not susceptible to scientific measurement, Bayer claims clinical evidence that the use of Levitra improves the quality of erections and produces a more rapid and reliable response to sexual stimulation than Viagra.

CIALIS

Cialis also gained FDA approval in 2003. The standard doses vary between 5-20mg. The tablet should be taken about thirty minutes before any expected sexual activity and once the effect is achieved, it should last for up to thirty-six hours.

The most common side effects are headaches, stomach ache, some back or muscle pain, and sudden flushing or blushing of the face or neck. In very rare cases, Cialis may produce allergic reactions including rashes, dizziness, sweating and/or some breathing difficulties.

There are food restrictions except that you should not:

  • eat grapefruits or drink the juice
  • it is unwise to drink any alcohol. If the social situation makes it difficult to avoid, you should not consume any significant quantities of alcohol.

Eli Lilly and Company has clear clinical evidence that the effects of Cialis last for a longer time in the body and claims that their drug allows a more natural and spontaneous response to sexual stimulation than the other two drugs.