How Viagra (Sildenafil) Works | Impotence Treatment

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Viagra (sildenafil) works by relaxing the blood vessels to the penis so allowing better blood flow and takes from 20 to 60 minutes to get to work but may take longer to work if taken with a heavy meal as this stops the medicine getting into the blood stream. It remains effective for 4 to 5 hours.

Viagra (sildenafil) works in most men no matter how long they have had erection problems, how bad their problems are, how old they are or what caused the problems. It has been studied in thousands of patients and used successfully by millions. About 20% of men with erection problems will not respond to Viagra.

When you take a Viagra (Sildenafil) tablet the following happens in your body:

sildenafil citrate enters your bloodstream and flows through your body

Sildenafil citrate enters your bloodstream and flows through your body

The sildenafil citrate attaches to the PDE5 enzyme in your penis and inhibits it's action

When you become sexually aroused, your brain sends the normal message to the NANC cells in your penis, which produce nitric oxide as usual

The nitric oxide creates cGMP, which starts relaxing the arteries in your penis

Since the PDE5 has been inhibited, the cGMP in the penis does not break down. Instead, it builds up and lets the arteries in the penis fully dilate

Your penis inflates with blood, and your are able to achieve a full erection

The usual starting dose is Viagra 50mg. If the desired effect is experienced but side effects are a problem then Viagra 25mg should be tried. If 50mg is not effective and side effects are not problematic then a Viagra 100mg should be tried after consultation with your doctor or pharmacist. You should not take more than 100mg of Viagra a day as this will not give a greater effect but does increase the risk of side effects.

A UK doctor will make a diagnosis and may prescribe a treatment