Viagra effects and contraindications

The urologist explains how Viagra works in the human body.

One of the biggest fears in the male universe is not being able to maintain an erection during sex. Even sexually stimulated, some men have difficulty keeping the penis rigid and may end up failing at the time H.

Effects

This loss of erection is called erectile dysfunction and can be both a physical and a psychological problem. The good news is that 17 years ago there was a known drug to treat the problem: sildenafil citrate, a drug commonly known as viagra, was developed by American doctors to combat male impotence.

The anatomy of the penis has two cylindrical cavities, known as corpora cavernosa, which are positioned near the spongy body. At the time of erection, these regions are inundated with the blood carried by the arteries, keeping the corpora cavernosa tense and inflating the penis (see the illustration on the side). The dysfunction occurs because, for some reason, the arteries attached to the penis are not sufficiently open to exert pressure on the corpora cavernosa and veins. With this, man has difficulty in having or maintaining an erection.

Sildenafil citrate therefore came to combat this problem. According to the urologist Luiz Khoury, the drug has a vasodilatory effect. “It works by increasing the flow of blood in the region, and it is important to note that it is an erection facilitator, which works together with desire and libido, not spontaneously.

Duration

According to Khoury, medicine acted up to eight hours for the patient. “This does not mean that the patient has the erect penis all this time, it helps erection during an eight-hour period.There are other substances, similar to sildenafil, which have different performances, which can range from 16 to 36 hours” .

Khoury explains that in addition to the goal of improving the image of erectile dysfunction, the drug is indicated for other images. “He has researches and works that point out that viagra has results for prostatic hyperplasia, a type of urinary disease. It can also be used for pulmonary hypertension, which is a disease that has nothing to do with urology” , He says. .

According to the specialist, the substance is contraindicated for some patients. “It is still contraindicated for those who have an ophthalmological disease, a type of retinopathy, which makes it impossible for the patient to take,” he says.

Side effects

Among the side effects that the drug may present, the headache and a reddening of the skin are the most common due to vasodilation. Moreover, according to the viagra label, the man can also present images of blurred vision, greater sensitivity to light, color distortion, palpitations, rhinitis and poor digestion. People with a predisposition to heart problems should consult a doctor before use.