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The Effects of Viagra 25 mg

| By Patience Paradox, MA
The Effects of Viagra 25 mg
The Effects of Viagra 25 mg Photo Credit Jack Hollingsworth/Photodisc/Getty Images

Viagra is one of the main drugs used to treat male impotence. It is available in several dosage levels, including 25 mg, 50 mg and 100 mg. A doctor will prescribe a starting dose of 50 mg for most men. However, the dose is often decreased to 25 mg if the higher level achieves a good result or if medical conditions make a lower dose a necessity.

How Viagra Works

Achieving and maintaining an erection depends on blood flow. Normally, when a man is sexually aroused, chemical interactions in the body cause blood to fill the tissue inside the penis and it hardens and becomes erect. Viagra assists this process by relaxing the muscles around arterial blood vessels and increasing the flow of blood to the penis. Viagra functions similarly regardless of the dose taken but the effects of the drug are more pronounced as the amount of medication is increased.

Fewer Side Effects

The 25 mg dose of Viagra makes it less likely that side effects will occur. For most men using Viagra, more does not necessarily equal better. Side effects such as color distortion, dizziness, headaches and heart problems are much more common in in men taking high doses of the drug. So it makes sense that the lowest dose of the medication that can help a man achieve and maintain an erection should be used.

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More Careful Dosing

For some men, using the 25 mg dose of Viagra helps ensure that the drug does not interfere with other conditions. Although taking a higher dose of Viagra is not a problem for most men, those with cardiovascular risk factors such as high cholesterol, obesity and diabetes require careful dosing. Viagra relaxes blood vessels and lowers the blood pressure, causing increased heart rate. Such actions can lead to heart attacks and other problems in susceptible individuals.

Better Drug Clearance

Elderly men as well as those with liver or kidney problems have a reduced ability to clear Viagra from their systems once it has served its purpose Those taking certain drugs, including protease inhibitors, erythromycin, Tagamet, and ketoconazole may also have a decreased ability to eliminate Viagra. A dose of 25 mg of Viagra is usually prescribed in such cases to avoid the effects of too much medication circulating in the blood.

Relief for Prostate Sufferers

Men with prostate problems often suffer from impotence. Unfortunately, they may be unable to use Viagra due to adverse side effects that occur when combined with some medications used to treat prostate problems. When taken with alpha-blocking agents, for example, Viagra can induce extreme low blood pressure leading to fainting, blurred vision, confusion or dizziness. Since the 25-mg dose of Viagra does not have such an extreme effect, it is useful for treating men who take alpha blockers.

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References

author image Patience Paradox, MA
Patience Paradox is a licensed counselor. She has been a health and psychology writer for more than 15 years and her work has appeared in the "Encyclopedia of Nursing," among other journals. She has master's degrees in clinical psychology and a bachelor's degree in health sciences.
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