October 3rd, 2010 by admin

Sildenafil Citrate(Viagra) was originally developed in 1991 as a treatment for angina, orchest pain.The drug, marketed under the name Viagra, received FDA approval as a treatment for erectile dysfunction in March 1998, and since that time it has been prescribed for more then 20 million men worldwide. It was the first oral medication approved by ED treatment and selling by Buy Viagra Online. Viagra is a vasodilator, a drug that has the effect of dilating the blood vessels. It works by improving blood circulation to the penis, and by enhancing the effects of nitric oxide, the agent that relaxes the smooth muscle of the penis and regulates blood vessels during sexual stimulation, allowing the penis to become engorged and achieve an erection.

The average recommended dose of Viagra is 50 mg.

It comes in doses of 25 mg., 50 mg., and 100 mg to. The medication is taken approximately one hour before sexual activity is planned, and may remain effective for up to four hours. One drawback is that to be effective, it should be taken on an empty stomach. Also, high-fat foods can interfere with the absorption of Viagra. Viagra does not increase sexual desire. Sexual stimulation and arousal are required for it to be effective.

Many insurance plans cover the cost of Viagra, provided it is prescribed to treat erectile dysfunction. The pills cost approximately $10 each, and insurers may limit coverage to a specific number of pills each month.

The primary drawback to Viagra, which works about an hour after it is taken, it that the FDA cautions men with heart disease or low blood pressure to be thoroughly examined by a physician before obtaining a prescription. At least 130 men have died while taking Viagra. However, the FDA said the men—most over the age of 64—died of heart attack or stroke due to health problems exaggerated by sexual activity, not the drug itself.