Erectile dysfunction (ED), which is the inability to conceive and maintain a healthy erection for long enough to have fun and satisfying sex, affects many men. ED is more common in men older than 45 for a variety reasons. Older men taking various medications may have their sex drive lowered.
We assume that our sex drive decreases with age, so we accept ED as a normal condition. The fact is that many men are unable to erection due to physical conditions. ED was a psychological or mental problem until the 1980s. This assumption was shared by most people, even urologists. In 1983, Dr. Giles Brindley presented to the American Urological Association. He demonstrated that a penis can be made erect with the drug Phentolamine. He demonstrated the idea by using his own penis in a public demonstration. Brindley discovered that the penis can be made to erect by relaxing the blood vessels that lead into it. When blood vessels become relaxed, more blood can be absorbed and the penis will inflate a balloon-like device to form an erection. Slowly, it became clear that ED was not a result of mental or psychological problems but physical changes in an adult male. Viagra - Controlling Penile Valve Although phentolamine, the drug Dr. Brindley used to get a public erection, was used with some success in 80's and 1990's, there were two problems with the drug. It isn't selective enough to only target the penis so the effects it has on other parts are not predictable. Second, it does not cause sexual stimulation to produce erections. Phentolamine can be used to get an erection at any time. It will last until the drug's effects wear off. These two issues were first overcome by Viagra. It was first introduced by Pfizer in 1998. Sildenafil citrate is the active ingredient in Viagra. Viagra doesn't relax the blood vessels in the penis. It enhances the natural processes that occur when a man has been sexually stimulated. It controls what we could call "Softeners", which are chemicals found in the body that make the penis soft after an erection. It works like this. The brain of a man who is sexually stimulated sends signals to his brain that activate the production chemicals that relax blood vessels in the penis. These are called "Hardeners". The production of Hardeners relaxes blood vessels, increasing blood flow and elevating the penis. Nature has created a way for erections to slowly subside. While Hardeners are produced to relax blood vessels, the body also produces Softeners to neutralize and break down the Hardeners. These enzymes are known as phosphodiesterase (5 (PDE5)). The penis will stay erect as long as the sexually stimulated man is still producing more Softeners than Hardeners. The production of Hardeners will decrease and the erection will cease hatuasolutions.com It is generally accepted that ED is due to an imbalance in Hardeners or Softeners. Either the body produces too few Hardeners or not enough. The result is inability to maintain an erection. Viagra blocks the production of softeners. This allows the Hardeners in the blood vessels to the penis to build up and cause hard, sustained erections. It is amazing that the process works without sexual stimulation. Viagra is not meant to replace stimulation. It simply allows the natural chemicals that are created by sexual stimulation to do their job. When the brain stops creating Hardeners after sex, the erection naturally ceases. The normal functions are returned to their previous state after Viagra's effects wear off, which is usually within 4 to 5 hours. There are always potential side effects with any drug. Viagra should not be used if you're taking nitroglycerin, nitroglycerin, or any other nitrate-based drugs. Also, Viagra can cause severe blood pressure drops if combined with heart medications or blood pressure medication. Viagra is not recommended if you have kidney or liver problems.
0 Comments
Leave a Reply. |