Viagra is a pill used to treat erectile dysfunction (impotence) in men. It can help many men who have erectile dysfunction get and keep an erection when they become sexually excited (stimulated).

You will not get an erection just by taking this medicine. Viagra helps a man with erectile dysfunction get an erection only when he is sexually excited.

However, you should keep in mind that Viagra is not useful for everyone. Necessarily talk with your doctor if you are suffering from any cardiovascular diseases such as angina, hypotension, coronary heart disease, abnormal heart beat(arrhythmia). If you are taking Nitrate drugs during treatment you may experience a drop of blood pressure leading to life-threatening conditions.

Also let your health care provider know if you have liver disease, eye problems, anemia and leukemia, multiple myeloma and cavernosal fibrosis. You doctor should specify the right dosage for you relying on age, medical conditions and use of other medication. Usually the recommended dosage of Viagra is 50mg one hour prior to the sexual intercourse.

In people over 65 years of age the treatment with Viagra should be carried only under health care providers supervision. In elders the doctors prescribe the lowest dose of Viagra(25mg) to control erectile dysfunction. Monitoring of vital functions is required.

Viagra may cause a certain number of side effects. If you experience severe headache, urinary tract infections, vision problems, rash, stomach disorders, facial flushing seek medical attention immediately. Usually in appropriate use according the doctors instruction Viagra is well tolerated.