Sildenafil (the original drug has the trade name Viagra) only affects the natural using the viagra mechanisms of erection. Scientists have developed a new drug to increase blood flow to the heart muscle and lower blood pressure. However, he did not live up to expectations. But it was noted that this drug provides a noticeable blood flow to the male genital organs, and as a result, the quality of erection improves. This drug was called Viagra. The active substance of the drug is sildenafil. Currently, many drugs with this active substance have been registered. He acts only when a man experiences natural sexual arousal, and when ...
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