Sexual impotence or erectile dysfunction penile recently bandied about by the advent of Viagra or Viagra Online (whose active ingredient is sildenafil) can be defined as the inability to achieve an erection, allowing the intercourse.

This dysfunction, which so greatly affects the quality of life for many people, affected (with varying severity) to 15% of the male population aged 40 to 70 years and 52% of those over 70 years.

Erection is a complex phenomenon determined by the accumulation of blood in the penis. This body has some cavernosa which, like sponges, are filled with cells. Through arteries blood reaches them, under normal conditions, is evacuated by the venous system. When the flow of blood to enter and exit are similar and balanced, the penis is in a state of flaccidity. With the stimuli that trigger sexual desire, arteries and corpora cavernosa relax, more blood enters the veins are compressed against the roof of the penis.

This prevents the venous return, so much more blood enters the penis comes out and takes on volume and consistency to reach the phase of rigidity that makes possible a complete and satisfactory sexual intercourse. Once ejaculation occurs, or sometimes without reaching it, the smooth muscle of the corpora cavernosa and the arteries contracted allowing emptying of them and again reaching the normal size penis.

This process is actually more complex than the brief description above might suggest. He spoke on many factors: visual, tactile, psychogenic, cardiovascular, hormonal, ... The erection is therefore a delicate process that can be inhibited by many circumstances. Sometimes even maintain the initial erection can be difficult. These things happen, and not assume greater significance if they occur with sporadic or seasonal, and then return to normal. We all know that there are times when light stimuli can trigger a reaction in the penis and others where there is little or no reaction to stimuli of similar or greater intensity erotic. This variability is biological, has a great physical and emotional component, and we understand it as normal.

The erection, a very complex phenomenon.

The man and his partner, therefore, must assume that the erection is not reduced to mere causal connection "stimulus-reaction". We are always in the same provision for erotic haul, whether we know. Parties that the erection may fail due to many causes. Let's refer only to the helplessness of people who previously had sex without problems and that one day begin to notice a permanent loss of erectile capacity. And, therefore, an absence of sex with penetration and ejaculation. It's called secondary impotence, which can be organic and functional.

In the organic injury or illness is a level of spinal nerve injury or peripheral nerves, arteriosclerosis of the arteries which impedes blood flow, a failure of the veins that allow blood to escape and may also be due to intake of some drugs: blockers and diuretics used to treat high blood pressure, some antidepressants, anxiolytics and neuroleptics. Cimetidine and ranitidine for stomach treatment and insulin and other oral agents, can also generate impotence. It can also cause thyroid problems, chronic liver disease and other metabolic illnesses.

There are many factors that could cause impotence, and needs to consult a physician to determine the cause and make the most appropriate treatment.