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Viagra is a drug used to treat erectile dysfunction or impotence. It works by relaxing muscles and increasing blood flow to particular areas of the body. The generic name of the drug is sildenafil which is sold under the brand names of Viagra and Revatio.

How Viagra Is Taken

Viagra should always be taken according to the instructions given by your doctor and on the drug’s prescription label. It should never be taken more than once in a 24 hour period. Viagra is taken when needed and this can be 30 minutes to an hour before sexual activity. Viagra only creates an erection when sexual stimulation occurs, and will not provoke an erection without this added factor.

If you experience any of the side effects mentioned above during sexual activity then you should stop taking the drug and contact your doctor, especially if you experience vision loss, nausea, tingling or numbness.

Viagra is prescribed in doses of 25 milligrams, 50 milligrams and 100 milligrams in a blue film-coated tablet. Revatio is prescribed in a 20 milligram dose in a white film-coated tablet.

If you miss a dose – since Viagra is only taken when needed then you will not be on a dosing schedule and do not need to worry about missing a dose. If you are on the drug brand known as Revatio, then you will need to take the missed dose as soon as you remember, but skip this if it is already time for the next dose. Extra medication should never be taken in an effort to make up for a missed dose.

If you overdose – you should always contact a doctor and seek medical attention if you take too much of the medicine. You may experience a number of symptoms ranging from nausea to fainting.