Viagra belongs to the class of PDE-5 inhibitors and is used to deal with erectile dysfunction, or male impotence. This medication works when a man is sexually excited, but it doesn't cause sexual arousal itself. So, this medication can provide its effect when a man is sexually aroused.

In order to understand how Sildenafil works, we should discuss the mechanism of getting an erection. When a man is sexually stimulated and aroused, a certain substance is released in the erectile tissue which is called nitric oxide. This substance stimulates an enzyme that releases another substance known as cyclic guanosine monophosphate, which in its turn relaxes the cells of smooth muscle. This causes the arteries in the penis to widen and as the result, the blood flows into the penis more easily. One more effect of the medication is that it cases the erectile tissue itself to fill with blood. As a result, erection arouses.

If a man is not sexually aroused, the brain will not provoke the release of nitric oxide and the body will not produce cyclic guanosine monophosphate. Sildenafil Citrate is used by a great number of men suffering from erectile dysfunction as it has shown that it works safe and effectively and provide a good result in dealing with impotence. One should remember, though, that this drug is not indicated for everyone.

This medication might cause some side effects. Sildenafil can lower blood pressure in some people. Usually this drop of pressure is not significant and causes no serious health problem. Nevertheless, its effect can be raised if it is taken along with nitrate medications, usually prescribed for heart conditions. In some cases the combined use of both of these drugs can lead to serious health problem and even can be fatal.

One of the most widely asked questions is whether Viagra can be used in people with a heart condition. Patients who have a heart condition should discuss the use of Sildenafil Citrate with the medical professional. One should remember that medication might cause serious interactions with nitrate medications, commonly used for a heart condition.

People also frequently ask if Viagra can be used by women. The answer is that it is not indicated for the use in women, but only for treating erectile dysfunction in males. Viagra starts its action within an hour after you administer it and remains effective for 4 to 6 hours. Nevertheless, if it is taken with high-fat food, it might take longer for the medication to become effective.

The right dose should be determined by the medical professional taking into the consideration the existing health conditions and the use of other medications. Besides, the doctor will take into the account the age of the patient and the severity of erectile dysfunction. Remember that Viagra may not show its effect the first time when you take it. Usually, it is recommended to take Viagra several times before choosing some other medications.