16th World Congress of Anaesthesiologists

28 August - 2 September 2016
Hong Kong Convention and Exhibition Centre

Viagra (Sildenafil)

Viagra is a medication which is produced on the basis of the medical product Sildenafil Citrate. Viagra is the first representative of a new group of medications of PDE-5 (phosphodiesterase inhibitor type 5) and one of the best drugs for the treatment of erectile dysfunction.

Pharmacological action

Viagra causes arteries to expand, thus allowing more blood flow to the penis. It comes into effect in the presence of sexual arousal and when it is absent, there will be no erection. At the end of sexual intercourse erection is naturally terminated. Effects of Viagra are not associated with the effect on libido or hormones.

Long-term side-effects

During the last five years, "Pfizer" conducted clinical trials that involved patients treated with Viagra for a long time - up to three years. When used properly, the drug showed no evidence of increasing risk of use. Observed only mild and transient side effects, not heavy and not prolonged. Viagra can cause some side effects. They are usually slightly or moderately expressed, and do not last long: sometimes there are headache, facial flushing, indigestion, nasal congestion. When you notice side effects - tell your doctor.
More than 90 clinical studies involving over 8000 patients, confirmed the efficacy and safety of the drug when it is used in accordance with instructions.

Usage & Dosage

Viagra can be used by men older than 18. This drug is prescribed in form of tablets with blue color, which need to be used directly before beginning of sexual intercourse. If you decide to buy Viagra pills at first time, it recommends you to consult with doctor-specialist. At first it requires because of learning of your diagnosis and to find the most convenient dose of Viagra and also to begin new treatment of ED.

  • Minimal day dose of Viagra is 25 mg. It is prescribed to men, which are noticed with chronic disorders\diseases and also for men older age.
  • Average recommended dose for majority of men is 50 mg of Viagra 1 time a day.
  • In case of effect absence, dose can be increased till 10mg a day.
  • Pills Viagra are required to use as minimum 25-50 mg till beginning of sexual arousal and desirably on empty stomach.
  • After use, pharmacologic action will be least 4 hours.

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