This site is not affiliated with any of the drug companies or the fda. Federal health officials are probing reports of blindness among dozens of men who. If you have a possible case involving prescription drug side effects, you can get blog there are posts about regulatory actions, medical studies, and journal articles.
An observational study evaluated whether recent use of pde5 inhibitors, as a class, was associated with acute onset of naion. Tags blindness, cialis, drug injury, ed drugs, fda, label changes, levitra, naion, nonarteritic anterior ischemic optic neuropathy, side effects, viagra, vision loss the prescription drugs discussed on this site are approved for use by the the food and drug administration (fda). 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.
Risk factors include diabetes and heart disease, two of the leading causes of impotence. Whether it affects blood flow to the eye isnt known, but pomeranz argued that some effect on the optic nerve is plausible. 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.
Vioxx, celebrex and bextra all fall into a category of drugs known as cox-2 inhibitors. Pfizer also said at the time that viagra had a 68 percent worldwide market share. But many now are wondering if medicines a 200 billion industry annually are coming out too fast and doing too much harm.
Please understand that the drug injury watch website is for general information purposes only, and should not be regarded as medical advice or legal advice. 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. 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.
He added that the condition is rare and there isnt yet cause for widespread concern. Vioxx from the market last year because of its potentially lethal side effects. Viagra and its competitors work by slightly dilating arteries so that blood flow in the penis increases. In july 2005 the fda ordered warnings be put on the package insert labels of these ed drugs, or impotence drugs, to the effect that some users of cialis, levitra, and viagra have developed naion, a form of blindness. Levitra is sold in the united states by glaxosmithkline plc and schering-plough corp.
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. Doctors and patients have become increasingly wary of the downsides of prescription drugs after merck & co. Risk factors include diabetes and heart disease, two of the leading causes of impotence. 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. Whether it affects blood flow to the eye isnt known, but pomeranz argued that some effect on the optic nerve is plausible.
Vioxx from the market last year because of potentially deadly heart trouble. 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 fda has 43 reports of naion among the impotence drug users 38 for viagra, four for cialis and one for levitra, said spokeswoman susan cruzan. For more than two decades, americans have mostly pressed for quicker approval of what they hope can be lifesaving drugs for such diseases as aids and cancer. Pfizer also said at the time that viagra had a 68 percent worldwide market share.
At the same time, however, the fda stated that it is impossible at present to know if naion is a side effect of these ed drugs, or an unrelated medical condition. 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. Such an event may be a sign of nonarteritic anterior ischemic optic neuropathy (naion), a rare condition and a cause of decreased vision, including permanent loss of vision, that has been reported rarely postmarketing in temporal association with the use of all pde5 inhibitors. From this information, it is not possible to determine whether these events are related directly to the use of pde5 inhibitors or to other factors see adverse reactions (6. Because the drugs affect blow flow a connection makes sense, nbcs chief science correspondent robert bazell told msnbc friday. Those are rare numbers, given that viagra alone has been used by 23 million men worldwide since its approval in 1998, according to maker pfizer inc. 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. Securities and exchange commission that sales of the drug rose 5 percent to 438 million in the first quarter of the year. All three also warn about temporary vision changes seeing bluish tinges or having difficulty distinguishing between green and blue. Vioxx from the market last year because of its potentially lethal side effects.Aug 1, 2010 ... Sildenafil (Viagra) opened a lot of eyes when it revolutionized the ... The more common but less serious side effects of ED pills may also involve ...