Scientists have developed a new drug to increase blood flow to the heart muscle and reduce blood pressure . However, it has not met expectations . But it was noted that this drug provides significant blood flow to male genitals , and as a result , improves the quality of erections. This medication was named "Viagra" . It acts only when a man feels a natural sexual arousal , and when sexual intercourse is completed, the penis naturally returns to the relaxed state viagra without prescription . In other words, "Viagra" affects only on natural mechanisms of erection and this was its undeniable novelty and secret huge popularity .
When you need to be careful?
Caution in the use of "Viagra" need people who are going to manage after receiving all sorts of mechanisms. Sometimes after taking the drug in humans can occur rapidly undergoing change color perception with a predominance of blue flowers. In this regard, the one of the U.S. airlines banned its pilots to accept "Viagra" an hour before the flight . Need to be especially careful of people with severe diseases of the cardiovascular system ( heart failure, angina , stroke ) . They need constant medical supervision . Sexual intercourse - is a serious exercise for a person with cardiac problems . Keep this in mind if there are symptoms such as pain in the heart when the load of Physical and / or at rest, impaired memory and mental performance , progressing over the last few months. Serious consideration to the question worth and those who have suffered a heart attack or stroke. This means that it is obligatory to consult with your doctor about the advisability of taking "Viagra" . There are some men who do not have to accept "Viagra" . Since the "Viagra" is involved in the biochemical processes associated with the exchange of nitric oxide , it can interact with other drugs called nitrates , which are used to treat heart disease viagra without prescription . Therefore , any man who takes nitrates in any form should not accept "Viagra" under any circumstances . Caution should be exercised and those patients who have previously occurred priapism. Although to date no reported reports of priapism while taking "Viagra" , patients who have a predisposition to its occurrence is also needed serious medical supervision.Buy now