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Viagra
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Viagra works one hour after taking the pill.
Sildenafil Citrate is the first active agent and prescription drug against impotence to have been marketed. Made by Pfizer, Sildenafil has become the treatment of erectile dysfunction against the most popular in the world. The tablets of Viagra may interfere with other medicines, especially those used to treat chest pain. With the active ingredient Sildenafil citrate, the effects of the blue pill last up to 4-5 hours. If you do not suffer from erectile dysfunction, do not take Viagra. Similarly, if you are a woman, do not take it.
Viagra should not be taken with medications containing nitrates. Men taking Viagra are able to get an erection sufficient for penetration. Sildenafil requires sexual stimulation to become active in the body and works by relaxing the muscle that regulates blood flow into the penis. Viagra does not promote an erection if you are sexually stimulated. In the absence of sexual arousal, it produces no erection. Sildenafil results in mild and transient decreases in blood pressure, which in most cases do not result in clinical effects. Do not take Viagra with other drugs if your doctor allows it.
Viagra does not increase libido and does not affect fertility. Two clinical studies were designed specifically to assess at what time after administration and for how long Sildenafil could induce an erection in response to sexual stimulation. There are a number of drugs that slow or prevent the degradation of the active ingredient of Viagra in the liver.