The drugs label also warns of erections lasting longer than four hours, painful erections lasting longer than six hours, headache, flushed skin and vision problems. Howard pomeranz of the university of minnesota reported in an ophthalmology journal seven patients who reported naion vision loss occurring within 36 hours of a viagra dose. The maker of cialis already has voluntarily added a one-line mention to its label.
It may aid in the treatment of enlarged hearts that can result from high blood pressure, tests on animals indicate. The questions come at a time when federal regulators and the drug industry are facing criticism about what they do to ensure the safety of drugs already on the market. Rates of women who are opting for preventive mastectomies, such as angeline jolie, have increased by an estimated 50 percent in recent years, experts say.
Viagra also is at the center of controversy over medicaids payment for prescriptions of the drug for convicted sex offenders in new york and other states. The possibility of a link with blindness was raised publicly earlier this year, when dr. Pfizer was asked to remove its pain reliever bextra from the market because of its side effects and sales of its other arthritis drug celebrex are falling.
Federal health officials are probing reports of blindness among dozens of men who used viagra and other impotence drugs but at the same time cautioning that the vision loss can be linked to the same illnesses that lead to impotence. Merck potentially faces thousands of lawsuits over vioxx and analysts have estimated its liability may reach 18 billion. Vioxx from the market last year because of its potentially lethal side effects.
Pfizer shares declined friday on the new york stock exchange after news of the blindness cases. Industry critics have been demanding that drug companies conduct more post-marketing studies in order to do a better job of discovering side effects once drugs hit the market. Also, patients taking drugs that contain nitrates have been warned not to take viagra because of sudden, unsafe drops in blood pressure.
Viagra and its competitors work by slightly dilating arteries so that blood flow in the penis increases. He added that the condition is rare and there isnt yet cause for widespread concern. Federal health officials are probing reports of blindness among dozens of men who. Vioxx, celebrex and bextra all fall into a category of drugs known as cox-2 inhibitors. Whether it affects blood flow to the eye isnt known, but pomeranz argued that some effect on the optic nerve is plausible.
Levitra is sold in the united states by glaxosmithkline plc and schering-plough corp. Viagra, approved to treat erectile dysfunction, should not be used by men with heart conditions whose doctors have warned them not to have sex. Securities and exchange commission that sales of viagra rose 5 percent to 438 million in the first quarter of the year. Because the drugs affect blow flow a connection makes sense, nbcs chief science correspondent robert bazell told msnbc friday. There have been no reports connecting levitra to blindness, said michael fleming, a spokesman for glaxosmithkline plc.
All three also warn about temporary vision changes seeing bluish tinges or having difficulty distinguishing between green and blue. The drugs label also warns of erections lasting longer than four hours, painful erections lasting longer than six hours, headache, flushed skin and vision problems. Vioxx from the market last year because of its potentially lethal side effects. Also, viagra users who suffer naion in one eye should be cautioned that continued use might raise the risk of vision loss in the other eye, pomeranz wrote. It may aid in the treatment of enlarged hearts that can result from high blood pressure, tests on animals indicate.
Also, patients taking drugs that contain nitrates have been warned not to take viagra because of sudden, unsafe drops in blood pressure. Also complicating the question naion is considered one of the most common causes of sudden vision loss in older americans, and estimates suggest there are anywhere from 1,000 to 6,000 cases a year. He added that the condition is rare and there isnt yet cause for widespread concern. Risk factors include diabetes and heart disease, two of the leading causes of impotence. Pomeranz told msnbc friday that the drug is doing something to alter the circulation of blood to the optic nerve and in turn causing an injury to the nerve resulting in a loss of vision. Viagra and its competitors are blockbuster drugs that revolutionized treatment of erectile dysfunction, and they already come with serious warnings theyre not to be used by men who take nitrate-containing drugs, because the interaction could cause deadly drops in blood pressure, or by men with heart conditions whose doctors have warned that sex itself could be too much exertion. But publicity over the fda investigation could result in more cases coming forward, said bazell, noting that a bigger study examining the link is needed. The food and drug administration disclosed friday that it was in discussions with the makers of viagra, cialis and levitra about what the labels of those drugs should say about the rare cases of varying degrees of vision loss, including blindness. Pressure on the fda to investigate reports of side effects has increased since merck & co. Securities and exchange commission that sales of the drug rose 5 percent to 438 million in the first quarter of the year.★ can viagra make you go blind. Your health is important. can viagra make you go blind Stop Searching About Best pill !. Check Price »