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Brand names: Viagra, Revatio

Generic names: Sildenafil citrate

Viagra is a powerful and safe drug used to treat erectile dysfunction. Erectile dysfunction can be described as the inability of a man to achieve and maintain an erection long enough to have sex. Viagra is currently the world’s most popular and recognizable pill prescribed to men with this problem. If you feel dizzy and nauseated while having sex, seek immediate medical help as you may be having one of the serious side effects of this medicine. Taking Viagra does not protect you from sexually-transmitted diseases: make sure you use a condom. If you experience a painful and long-lasting erection (over 4 hours) this may be a case of priapism. This is a very dangerous condition that may lead to the permanent damage of your penis tissues. Seek immediate medical help if you think you may be experiencing priapism.

Your age may require the doctor to adjust the dose – for men older than 65 a lower dose is prescribed (containing 25 mg of the active ingredient – sildenafil citrate). The same is true for patients suffering from liver or kidney problems. Taking certain medications, such as HIV treatment drugs (protease inhibitors) may be a reason for your doctor to adjust the dosage to ensure maximum efficiency. You need to follow all of your doctor’s recommendations in order to make sure Viagra is safe for you and you benefit from the treatment.