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The world famous Viagra is drug manifested in blood flow increase to the cardiac muscle during angina treatment research. In 90 years, researchers and pharmacists of American company “Pfizer” conducted trials on volunteers, who, according to their plan, was supposed to relieve chest pain of angina pectoris. A group of volunteers was consisted mainly of young individuals. Imagine their surprise when they feel rejuvenated for twenty years! Pharmaceutical company board of directors immediately started to produce a new drug, moreover, the tests have been carried out already. So Viagra has appeared.

Sildenafil has no effect on libido, the drug is effective only when a man feels sexual desire, causing persistent erection which can occur during sexual excitement only for about four hours after taking the drug. When intercourse is over, the penis naturally returns to its natural relaxed state. It means that Viagra helps men suffering from erectile dysfunction. Canadian Health Care Mall has various types of pills to stimulate a male erection.
pills of Viagra
According to the results of studies in recent years, Viagra helps in cases when erectile dysfunction is considered to be a co-existing disease of:

  • diabetes and other hormonal disorders;
  • psychogenic erectile dysfunction connected with age;
  • spinal cord injury and traumatic brain injury;
  • simultaneous exposure to multiple drugs, as well as when taking antipsychotics, antidepressants, tranquilizers.

Sildenafil, the active component, is a drug from the group of inhibitors of PDE5. The action of this group is based on the inhibition of penis vessels expansion, thus – enhancing erection in this function violation. In healthy people, Viagra does not cause either reinforcement or weakening of erection, the researchers of  “Pfizer” claim.

In general, experts advised not to experiment with types of viagra pills, and to tempt fate. If you are curious, you take a pill of Viagra and feel some heightened alertness and readiness for sexual exploits, then it is better to consult a sexologist or andrologist.

How does Viagra Perform?

The effect is manifested in half an hour after administration, Viagra performs (typically 50 mg) for about four hours. If you need to achieve a more rapid effect, such pills should be taken before meals. However, the drug should be agreed with the doctor and he determines acceptable treatment dosage.

The causes of erectile dysfunction are many, sometimes only the underlying disease should be treated and Viagra is one of these methods. This group of drugs is not addictive, does not interfere with the ability to conceive, rather – on the contrary, help in conception. What else should be noted, is the opportunity to experience several orgasms in a single use allowing you to shorten refractory period.

Side Effects

The most common side effects after taking Viagra:

  • headache;
  • face and neck sudden reddening;
  • anosmia and nasal cavity redness.

Contraindications

Men taking nitrates for angina and other cardiovascular diseases (nitroglycerin, Cardicat, isosorbide dinitrate and et al.) should be very attentive at Viagra intake because blood pressure may drop sharply so that the person loses consciousness and may even die. Patients suffering from, or having a predisposition to priapism should take the drug with extreme caution and only after consulting your doctor.