Viagra

Sildenafil citrate, marketed under the brand name Viagra, is also referred to as the ‘Blue Pill’. It is used for the treatment of erectile dysfunction. Pfizer Viagra is a prescription medication for men, used to increase the blood flow to the penis so that an erection can be achieved. Developed and marketed by the pharmaceutical company - Pfizer, Viagra is regarded as the most popular brand of prescribed erectile dysfunction pills.

Working of Viagra

Viagra sildenafil works as a potent and selective inhibitor of cGMP specific phosphodiesterase type 5 (PDE5) which is responsible for degradation of cGMP in the corpus cavernosum. One of the primary components of the process of erection involves the release of nitric oxide (NO) in the penis. Nitric oxide in turn helps activate the enzyme guanylate cyclase which results in increased levels of cyclic guanosine monophosphate (cGMP). This leads to smooth muscle relaxation in the penis because of increased inflow of blood and an erection occurs. In the presence of Viagra(Sildenafil citrate), normal sexual stimulation leads to increased levels of cGMP in the penis which in turn leads to enhanced erections. With sexual stimulation and activation of the NO/cGMP system, Viagra is able to cause an erection.

Viagra dosage

Viagra is available in dosages of 25mg, 50mg and 100mg, with the 50mg dosage being the most popularly prescribed by doctors. The recommended dosage of Viagra must be taken with a full glass of water either on an empty stomach or after a low-fat meal. Use of alcohol and grapefruit juice must be avoided when taking his medication. Grapefruit juice can increase the amount of medication in your bloodstream. It is an on demand tablet and can be taken 30 minutes to 1 hour before sexual intercourse; its effects lasts for around 4 hours in your body.

Precautions of Viagra

Under no circumstances should you increase your Viagra dosage without first consulting your physician.

You should talk with your health care provider prior to taking Viagra if you have:

  • Heart disease or blood vessel disease
  • Liver disease or liver failure
  • A history of a heart attack, stroke, or life-threatening arrhythmia within the past six months
  • Low blood pressure (hypotension)
  • High blood pressure (hypertension)
  • Sickle cell anaemia
  • Multiple myeloma
  • Leukaemia
  • A history of priapism, which is a painful erection lasting longer than six hours

 

Also, tell your doctor about all the medicines you take, including prescription and non-prescription medicines, antacids, vitamins and herbal supplements. Viagra is not indicated for use in individuals below 18 years of age.

Side effects of Viagra

Viagra is well tolerated by most people. When people do develop side effects with Viagra, the symptoms are usually minor. Headache, facial flushing, nasal congestion, urinary tract infections, vision problems including trouble telling the difference between blue and green, diarrhoea, dizziness, unexplained rash, back or joint pain, respiratory tract infections, flu like symptoms and indigestion are a few common side effects of this drug. Uncommon Viagra side effects include allergic reactions, temporary vision loss, fainting, congestive heart failure, vomiting, dry mouth, anaemia and sudden decrease in or loss of hearing.

Taking Viagra

If you want to take Viagra, you will first need a valid prescription from a registered doctor. You need to be above 18 years of age to take this drug and have chronic impotence. This drug shouldn't be taken for recreational purposes.





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