Basic Information On Viagra
Viagra is used to treat erectile dysfunction in men with functional reproductive organs. It works by preventing certain substances from lowering the effect of nitric oxide in the penis, which is responsible for smooth relaxation and healthy erection, when a man is sexually stimulated. The Viagra drug at recommended doses is not effective without sexual stimulation. Since this drug essentially improves blood flow, the same chemical composition can be used for treatment of pulmonary arterial hypertension in men and women.
Side Effects/Precautions For Viagra
Side effects of Viagra or Sildenafil which usually don’t require medical attention or treatment include redness of the face or chest, stuffed nose and headache. These problems are caused due to changes in blood pressure. The warmth that you may feel when you take this drug is also due to enhanced blood supply to your body. When the effect of brand or generic Viagra starts to wear off, these side effects also disappear. As your body gets used to the drug and builds tolerance, the side effects reduce in intensity.
You may not be prescribed Sildenafil if you have any cardiovascular problems like high blood pressure, a recent history of heart attack and bleeding disorders like hemophilia. Some men are also advised against sexual activity for health reasons. Such individuals should not take brand or generic Viagra. You need medical attention if you notice any sudden changes in your vision or if the erection is painful and last for longer than 4 hours. Men with deformities in the penis are not prescribed this drug. If you have any liver or kidney disease, then you must mention these to your doctor before you start taking this drug.
Viagra Dosage
The recommended dosage is 50 mg, that can be taken anywhere between 30 minutes and 4 hours before sexual activity. If satisfactory response has not been achieved, then the dose can be increased up to a maximum of 100 mg. It can also be decreased to 25 mg if required. Viagra should not be taken more than once a day. Individuals with renal or hepatic impairment are prescribed a dose of 25 mg. Dose increases are not considered, unless satisfactory renal and hepatic health has been achieved. Lower dose of 25 mg is also prescribed for men older than 25 years, if there are no kidney or liver problems.
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