What are the effects of Viagra?

Effects

Viagra might help men who cannot achieve or sustain an erection because of erection dysfunction. It improves the erectile response whenever a man has already been sexually stimulated, nonetheless it will not provide sexual stimulation. When there is no sexual stimulation, viagra won’t work.

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When sexual stimulation occurs, nitric oxide is released by the nervous system in the erectile tissue of the penis. Nitric oxide stimulates an enzyme that produces messenger cyclic guanosine monophosphate (cGMP).

cGMP causes the arteries in the penis to dilate, so the arteries and the erectile tissue fill with blood. An erection results.

Viagra prevents cGMP from becoming degraded, therefore the blood circulation and the erection can continue.

Dosage

The dosage changes if the drug is taken for erection dysfunction or for pulmonary arterial hypertension.

Viagra

For erection dysfunction, Viagra will come in blue, diamond-shaped pills, in doses of 25, 50, or 100 mg.

The individual requires a maximum of 1 pill in a 24-hour period, thirty minutes to 1 one hour before sexual intercourse.

Revatio

For pulmonary arterial hypertension, Viagra will come in white, round, film-coated tablets. People consider one 20-mg Revatio tablet 3 x a day.

Viagra overdose

A Viagra overdose could be serious. If you were to think you have had a lot more than the typical dosage, call a health care provider or local Poison Control Center.

symptoms of an overdose might include:

  • vomiting
  • blurred vision and distorted vision
  • papilledema – swelling in the optic nerve
  • optic neuropathy – harm to the optic nerve
  • tachycardia (increased heartrate)
  • prolonged priapism
  • blindness
  • rhabdomyolysis – breakdown of muscles
  • diarrhea

Deaths from viagra overdose are rare but possible.

History

Initially, Viagra was created by Pfizer scientists employed in the U.K. These were, in fact, focusing on a drug for hypertension, or high blood circulation pressure, and angina pectoris, an indicator of ischemic cardiovascular disease.

Through the phase 1 trials, it had been noted that the drug did hardly any to avoid angina but did induce marked penile erections. Hitting the marketplace in 1998, Viagra was the first oral medication approved to treat erection dysfunction in the U.S.

Viagra’s meteoric rise to fame offers seen it enter usage as an illicit drug. But, Viagra make use of in individuals without erection dysfunction does not appear to possess any effect. Although, researchers have noted that there surely is a substantial placebo effect. On an identical note, there is absolutely no proven benefit for women taking the drug.

In 2008, Viagra generated some $1.93 billion of revenue for Pfizer.