Medical professionals often use the term "erectile dysfunction" to describe impotence. Impotence and erectile dysfunction should be distinguished from other conditions that interfere with sexual intercourse, such as lack of sexual desire and problems with ejaculation and orgasm.
Damage to arteries, smooth muscles, and nerves of the penis can lead to impotence. One common cause of impotence is blood vessel and nerve damage due to diabetes mellitus. Other causes of impotence include low testosterone levels, kidney disease, chronic alcoholism, multiple sclerosis (a disease of the nervous system), atherosclerosis (leading to blood vessel hardening), surgical damage to nerves and blood vessels (for example, prostate surgery), and injury to the penis, bladder, pelvis and the spinal cord.
Some common medicines produce impotence as a side effect. These include certain high blood pressure drugs, antihistamines, antidepressants, tranquilizers, appetite suppressants, and cimetidine (an ulcer drug). Smoking affects blood flow in veins and arteries, and is also believed to lead to impotence.
Psychological factors such as stress, anxiety, guilt, depression, low self-esteem, and fear of sexual failure are associated with impotence.
If the underlying condition leading to impotence cannot be corrected, or if impotence problems persist, medications can help certain men achieve erection sufficient for sexual Intercourse as well as maintain erection after penetration.
The penis contains two chambers, called the corpora cavernosa, which run the length of the organ. Erection begins with sensory and mental stimulation. Impulses from the brain and local nerves cause the muscles of the corpora cavernosa to relax, allowing blood to flow in and fill the chambers. The inflow of blood creates pressure in the corpora cavernosa chambers, making the penis expand. Erection is reversed when muscles in the penis contract, stopping the inflow of blood and causing the blood in the chambers to flow out.
Cyclic guanosine monophosphate (cGMP), a signaling molecule within cells, tells the smooth muscle in the corpora cavernosa to relax and this lets blood flow into the chambers and be trapped for an erection.
The erection is lost when cGMP is degraded by an enzyme (PDE5), lowering the level of cGMP, so the muscle of the corpus cavernosa contracts again, the blood flows out of the chambers of the corpus cavernosa and the erection is no more.
(Viagra) is approved for the treatment of impotence (also known as erectile dysfunction). It was the first oral medication for this purpose.You can easily buy this drug in many online pharmacies like Online Drugs Store.
Viagra increases the body\'s ability to achieve and maintain an erection during sexual stimulation. Viagra does not protect you from getting sexually transmitted diseases, including HIV.Like all medicines, Viagra can cause some side effects. These effects are usually mild to moderate and usually don\'t last longer than a few hours. Some of these side effects are more likely to occur with higher doses. The most common side effects of Viagra are headache, flushing of the face, and upset stomach. Less common side effects that may occur are temporary changes in color vision (such as trouble telling the difference between blue and green objects or having a blue color tinge to them), eyes being more sensitive to light, or blurred vision. In rare instances, men have reported an erection that lasts many hours. You should call a doctor immediately if you ever have an erection that lasts more than 4 hours. If not treated right away, permanent damage to your penis could occur. Heart attack, stroke, irregular heartbeats, and death have been reported rarely in men taking Viagra. Most, but not all, of these men had heart problems before taking this medicine. It is not possible to determine whether these events were directly related to Viagra.
Sildenafil (Viagra) is an oral agent recently approved by the United States FDA for the treatment of erectile dysfunction. Its major mode of action is inhibition of the enzyme PDE5. Inhibiting this enzyme allows the cyclic GMP to stay around longer, thus maintaining erection. Viagra is not an aphrodisiac, it is not effective without sexual stimulation. It mainly enhances the normal physiologic erection.
Before taking Viagra,you should consult a doctor about this drug.This is only general information, and should not be relied on for any purpose. It should not be construed as containing specific instructions for any particular patient. Author of this article disclaims all responsibility for the accuracy and reliability of this information, and/or any consequences arising from the use of this information, including damage or adverse consequences to persons. No warranty, either expressed or implied, is made in regards to this information
