Viagra is an impotency drug that helps in giving you good erection. Once you take Viagra, there is nothing to worry of your sexual problems.

Viagra acts quick. It works on the penis muscles. When the muscles get relaxed, there is an increased blood flow in the region, which gives the penis good strength to erect.

Viagra comes in tablet form. The prescribed dosage for adults is 50 mg and for elderly persons, it is 25 mg. The drug has to be used an hour before any sex. Always bare in mind not to use more than one tablet a day.

Before having Viagra pills, discuss with the doctor about all your health issues, which will give him an idea about your health conditions. Tell the doctor if you have any issues related to the heart, kidney, blood and liver.

When taking Viagra, you have to be cautious. If you experience any ererction lasting for more hours, then you have to contact the doctor immediately as longer erections can damage the penis completely.

Never take alcohol, grape fruit or grape juice while using Viagra as these can only augment the risk of side effects.

The doctors may not prescribe Viagra if you are taking any nitrate drugs as using the two drugs together can lower the pressure, which can cause stroke or heart attack.

Viagra is also no exception to allergic reactions and side effects. Vision problems, diarrhea, indigestion, headache, flushing, urinary tract infection and nasal congestion are some of the side effects that occur with Viagra pills.