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Cialis helps to temporarily provide men with the ability to get and keep an erection by increasing blood flow to the penis. A man’s erection depends on the body delivering – and trapping – the blood in the penis long enough to provide the stimulation and satisfaction for sexual activity. Cialis, in clinical trials, has proven to do this for men who suffer from mild to moderate ED.
The penis contains two chambers – the corpora cavernosa – which runs the length of the organ. These chambers are filled with a spongy tissue containing smooth muscles, fibrous tissues, some spaces, veins and arteries. The urethra, which is the channel for both urine and ejaculation, runs along the underside of the chambers.
An erection
begins with either mental or physical stimulation, or both. Impulses sent
from the brain and the local nerves cause the this vein filled chamber
to relax which allows an increased blood flow to the area. Obviously,
this increase in blood expands the penis and then the blood is trapped
in the organ, which is what sustains the erection. The erection is not
reversed until the penis contracts to stop the inflow of blood and opens
the outflow channels, which then releases the blood.
Cialis works through its ability to help trap the blood flow through the
inhibition of a substance called PDE5, which in turn stimulates the creation
of a second substance cyclic GMP – cGMP – which is responsible
for the relaxation of the muscles in this area causing an increase in
the blood flow.
The advantage
of Cialis is the ability of the medication to linger in the man’s
system for up to 36 hours. This allows him and his partner to choose the
proper time and place for the love-making to take place.
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