Viagra (Sildenafil): Action and Usage. Sexual disorders

History of Pfizer Viagra (Sildenafil)

In fact, the worldwide Viagra (Brand and Generic Sildenafi) is a byproduct of the drug development which increase blood flow to the heart muscle and was carried out within the investigation of angina treatment. In 90th, researchers and pharmacists of the American company "Pfizer" studied the drug on volunteers, which, according to their plan, had to relieve the chest pain during stenocardia. A group of volunteers consisted mainly of not-so-young people. Imagine their surprise when they feel themselves twenty years younger! The company management started to produce new drug immediately and the tests were conducted.

Viagra (Sildenafil) for sexual disorders

Viagra (Sildenafil) does not affect the libido. The drug is effective only when a man feels sexual desire, causing lasting erection, which may occur at sexual excitement only during about four hours after the usage of the drug. When coitus is completed, the penis naturally returns to its natural relaxed state. This means that Viagra helps men who suffer from erectile dysfunction to make intercourse with natural erection.

According to the investigation results of the last years, Viagra helps in cases where erectile dysfunction is an associated illness with:

  • diabetes and other hormonal disorders;
  • psychogenic and aged-related erectile dysfunction;
  • spinal injury and cerebral injury;
  • simultaneous effect of several drugs, as well as the usage of neuroleptics;
  • antidepressants, tranquilizers.

Sildenafil, i.e. the active ingredient of Viagra, belongs to the group of inhibitors of phosphodiesterase type of the fifth (PDE-5). The action of this group is based on the suppression of the vasodilatation of the penis, and increasing of the erection in case of this function disorder. In healthy people Viagra does not cause any amplification or attenuation of erection, at least the researchers of the company "Pfizer" say so. Generally speaking the experts from "Pfizer" do not recommend to experiment and to provoke fate. In their opinion, if you are curious, and have taken Viagra pill and felt some cheerfulness and willingness to sexual exploits, then you should consult a sexologist or andrologist.

What is the Action of Viagra (Sildenafil)?

The action of the drug Viagra (generic Sildenafi) is manifested in half an hour after usage and the tablet acts (usually 50 mg) approximately four hours. If you need to achieve a more rapid effect, you should take a tablet before a meal. But taking the dosage should be coordinated with the doctor. There are many cases of erectile dysfunction and sometimes it is needed to treat only main disease, and Viagra should be taken. The drugs of this group are not addictive, and help to conceive. Generic Viagra helps to experience several orgasms at the one use because it reduces the refractory period.

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