What Makes Viagra Effective?
Viagra is a prescription medication that has been tested and approved by the Food and Drug Administration for the effective treatment of erectile dysfunction. This condition is found in men and is defined as being unable to achieve or maintain and erection suitable for sexual relations.
Viagra has been reported as an effective treatment for conditions associated with erectile dysfunction and works by blocking the chemical that results in the blood leaving the penis. By doing this the blood to this organ is increased thus increasing the ability to achieve an erection.
In order to understand how this medication works it is first necessary to understand a few things about erections.
When a man becomes aroused the nerves in the brain and penile region send out signals that initiate the release of certain chemicals causing the muscles of the penis to relax. In normal situations blood cannot reach the penis because of constriction however when these muscles relax blood enters the penile region resulting in an erection. Erection reversal occurs when another chemical referred to as PDE5 causing the breaking down of the chemical that causes the muscles to relax resulting in the muscles contracting again thus forcing the blood from the penis.
Viagra is effective in issues of erectile dysfunction because it blocks the release of PDE5. When this chemical is blocked the chemicals that cause an erection are left behind so that the penis muscles do not contract. This allows the penis to retain blood longer thus allowing the erection to be maintained.
The question that many men ask is does Viagra work without sexual stimulation? This question has a simple answer. Viagra has no control of the release of the chemicals that lead to an erection it only allows these chemicals to stay in the penis for longer periods of time therefore the answer to the question is no Viagra has no effect without some kind of sexual stimulation taking place.
Another common question that is asked is this. How much time does it take for Viagra to become effective? This answer is not quite so simple because it is dependent on each individual man and the severity of the sexual dysfunction that affects him. In some cases Viagra can work as quickly as the first fifteen minutes after it is taken however the average length of time is around thirty minutes. Although this medication is reported to remain effective for up to four hours the effects often begin to wear off after two hours.