Viagra or sildenafil citrate is a proven and reliable drug that helps men to combat erectile dysfunction.

An effect of Viagra is based on the local increase in blood flow in the cavernous body of penis, which gives rise to a stable erection. Viagra does not enhance sexual desire, so the drug is effective only when there is sexual stimulation. Erection naturally stops after sexual intercourse.

When you buy Viagra, do not forget that the drug is not compatible with alcohol and some medicines that contain nitrates. According to medical tests, alcohol can lead to a temporary inability to achieve erection. If you want to get the maximum benefit from medication, do not drink alcohol. Also it has been found that Viagra is virtually no interaction with other drugs. However, nitrates are the exception to the rule. The joint use of sildenafil and drugs such as nitroglycerin can cause to fatal reduction of blood pressure. Of course, you can purchase Viagra online, but only a doctor who is familiar with the history of your illness, can tell you how useful the use of sildenafil.

Sildenafil is taken according to the prescribed dosage once a day. Clinical studies have shown that 97% of men taking Viagra for 2 years or more reported about significant improvement their erectile dysfunction.

You can feel the effect of pill in half an hour and the ability to get an erection will be maintained for 4-6 hours. Viagra will help you to overcome not only physiological but also psychological barriers: only one pill will help you relax and get maximum pleasure.