Viagra® Side Effects
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According to popular erectile dysfunction drug maker, Pfizer, its well-known prescription drug has been taken by about 23 million men worldwide since its 1998 FDA approval. Viagra®, and other drugs like it, work by slightly dialating arteries so that blood flow in the penis will increase. A blockbuster drug, Viagra® has allowed the treatment of erectile dysfunction to emerge from a once seldom talked about problem to the $2 billion market it now resides in.
Still, despite the well-known brand name and rise to popularity, Viagra® side effects have been present from the start and might be part of the reason why it suffered an 11 percent decrease in revenue from 2003 to 2004. Viagra® warns that men who take nitrate-containing drugs, due to the interaction that could cause Viagra® side effects including deadly drops in blood pressure, should avoid its drug use. The drug is also not to be used by men with heart conditions whose doctors have warned that sex itself could be too much exertion.
Viagra® side effects also warn about temporary vision changes- seeing bluish tinges or having difficulty distinguishing between green and blue. The Viagra® side effects are different then the latest reports of blindness that has occurred among 38 users of the drug. Called NAION, or non-arteritic anterior ischemic optic neuropathy, the possible Viagra® side effects have not yet been attributed to the use of the drug. The U.S. Food and Drug Administration has issued warnings about the possible Viagra® side effects, and Pfizer is considering changing the warning label.
Although the possible Viagra® side effects have occurred in just a small percentage of men taking the drug, some experts are worried that the significance of the reports will be minimized. Most reports of NAION in men who had recently used an erectile dysfunction drug have occurred in Viagra® patients, though four recent reports have been associated to similar drug Cialis and one case with Levitra. Pfizer argues NAION would randomly happen among older men who have a history of diabetes, high blood pressure, heart disease or high cholesterol - the same conditions leading to sexual dysfunction - so the Viagra® side effects are the result of coincidence.
While the FDA is taking a closer look at the possible Viagra® side effects, the makers of Cialis have already changed their drug labeling. Since the reported Viagra® side effects may be more prone to occurring among users already at risk for suffering NAION, patients concerned with suffering blindness should discuss their treatment options with their individual doctors.
For more information on Viagra® side effects, please contact us to confer with an attorney.
