One of the most controversial drugs used in the market for last 30 years is Viagra. It is consumed for erectile dysfunction.

Some facts about Viagra:

  • Hypertension and angina pectoris were the conditions for which initially Viagra was designed.
  • Cialis and Levitra are the main competitors of Viagra.
  • If you are taking Viagra for recreation purpose, but it should be only used by people with erectile dysfunction.

What is Viagra?

Generic name sildenafil citrate is used for the treatment of erectile dysfunction and pulmonary arterial hypertension. It was developed by researchers of United Kingdom and was brought into the market by an American pharmaceutical company called Pfizer Inc.

Revatio is also another brand name of Viagra.

How does Viagra work in human?

Viagra is used by people who cannot naturally get anerection because they are suffering from a disorder known as erectile dysfunction. When sexually stimulated, the erectile response of a man improves causing anerection. If someone is not sexually stimulated, Viagra can’t work on that person. In the erectile tissues of the penis, the nervous tissue of a man releases nitric oxide. Nitric oxide stimulates an enzyme which produces messenger cyclic guanosine monophosphate (cGMP). The penis has many arteries which are dilated by cGMP. The arteries and erectile tissue get filled with blood,and as a result, anerection happens. The degradation of cGMP is prevented by Viagra making the erection to last longer.

Side effects of Viagra:

Most common side effects:

  • Nasal congestion
  • Sensitivity to light (photophobia)
  • Headache
  • Indigestion (dyspepsia)
  • Impaired vision

Less common side effects:

  • Some people complained of experiencing cyanopsia. According to them, everything they see appeared to have tinted blue tinge.

Infrequent side effects:

  • Viagra can cause Nonarteritic anterior ischemic optic neuropathy. Viagra can damage theoptic

Other potential side effects:

  • Heart attack
  • Increased intraocular pressure
  • Sudden hearing loss
  • Painful, long-lasting erection
  • Ventricular arrhythmias
  • Elevated intraocular pressure

Following people should consult with their doctors first before taking Viagra:

  • People with cardiovascular risks who are advised not to involve in any sexual intercourse.
  • Patients with severe liver impairment.
  • People who are on nitric oxide donors, nitrates, and organic nitrites.
  • People with low blood pressure or hypotension.
  • Peoplewith kidney disease.
  • Peoplewho are suffering from hereditary degenerative retinal disorders.
  • People who have had a recent heart attack or stroke.