Product Description

How does viagra work?

The technical explanation is that viagra is a phosphodiesterase type 5 (PDE5) inhibitor. Although the chemistry of the human body is complicated, an erection should be a simple matter of plumbing. In response to sexual stimulation, the brain sends a message to dilate the artery carrying blood into the penis. This allows more blood to flow inside where a sponge absorbs the inflow. As this sponge grows larger, it presses against the vein designed to carry the blood out of the penis. As more blood is trapped, the penis inflates. After ejaculation, the brain sends a message to contract the artery and the penis deflates.

There are several different reasons for erectile dysfunction but the most common is that the body releases the deflation message out of order, i.e. releases phosphodiesterase type 5 (PDE5). Viagra prevents this and so men respond naturally with an erection that lasts until sexual intercourse is complete and stimulation ends.

The same active ingredients also cure pulmonary arterial hypertension. This version of the drug is sold under a different brand name and releases the pressure in the blood vessels around the lungs and heart that would otherwise cause angina — a very painful rise in blood pressure in the chest.

What is generic viagra?

When the patent on a drug runs out, other manufacturers can make the same drug. They have no research and development costs to recover. There are no heavy marketing costs to create a brand. So you get an identical product at low, low prices. Get sex without it hurting your pocket.

What do the clinical trials prove?

Even though there is a significant amount of practical evidence that viagra is a safe and effective treatment, there have been an unusually large number of clinical trials. In part, this is because the need for an effective treatment for erectile dysfunction is so great. It is also driven by the need to ensure that a drug taken by so many million people is as safe as possible. Viagra has become a recreational drug also taken by healthy men and some women. The trials test the effectiveness of the drug at different dosages and try to develop more “scientific” ways of measuring the hardness of the resulting erections. For now, researchers rely on questionnaires to assess the “satisfaction” of both parties.