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Viagra is an efficient PDE5 inhibitor commonly used for the treatment of male impotence, scientifically defined as erectile dysfunction. Erectile dysfunction may affect even men that are quite young, which may have to do with psychological rather than physical reasons. In both cases, however, the condition is caused by insufficient blood flow in the tissues of the penis.

Since an erection usually results from the brain sending a message via the nerve fibers, psychological reasons may be just as important to discover and address as those physical ones. Viagra works by temporarily preventing the decomposition of an enzyme called cGMP, which relaxes the smooth muscles in the penis allowing more blood to flow in.

Viagra can come in three doses suitable for patients of different age that may have more or less severe cases of erectile dysfunction. There are many other factors used to determine every patient’s individual needs. You may be prescribed 25 mg, 50 mg, or 100 mg of Viagra, but it’s most common to go for the average dose first. If 50 mg Viagra works well for you, you will probably be recommended to use it in future, to make sure you get all the benefits of the treatment without experiencing any side effects.

In spite of what many people believe, Viagra is not a cure, rather than just a treatment. Neither is it expected to give an instant erection. In order for Viagra to work, sexual stimulation must be provided. Viagra patients are also supposed to keep taking it when needed every time they want to have sex, as otherwise, their erection will not be as stable as expected.

This drug is considered very safe and unlikely to cause too many side effects. A few ones you can experience include upset stomach, facial flushing, sensitivity to light, headache, or vision problems, all of which go away soon after they appear.