Online Pharmacy Viagra

Viagra (sildenafil citrate) may be prescribed for males suffering from erectile dysfunction (complete or partial inability to get or maintain an erection for long enough to have sex). This drug has been used for over a decade to treat the problem in males that cannot perform sexually due to physical or psychological reasons.

Before Viagra can be taken, it’s best to discuss the treatment with a doctor to see if any contraindications are present. Viagra is not supposed to be taken by men using any nitrates for chest pain, as the combination can lead to serious health effects. This is how Viagra works to treat erection: its active ingredient sildenafil citrate gets into the patient’s bloodstream and travels down to the penis, where it attaches to phosphodiesterase-5 enzyme. As soon as the male is sexually excited, a message is sent from the brain to the NANC cells, a process that leads to the production of nitric oxide. The arteries of the penis are relaxed because of the nitric oxide creating the cGMP enzyme. That cGMP enzyme does not get broken down as usual, because sildenafil citrate is preventing this from happening, so there is a further build up of the enzyme, allowing for a successful sexual intercourse.


Viagra comes in three doses — 25 mg, 50 mg, and 100 mg of sildenafil citrate. Each dose is designed to make sure the patient can take the minimal efficient one that will help to treat the problem. Such factors as being older than 65, having liver or kidney problems, smoking or using protease inhibitors may affect your dose. In some of those cases, you may be limited to the 25 mg dose of Viagra taken not more often than every 48 hours. It’s important to follow all the directions of the doctor or those on the label to benefit from using Viagra as expected.