Fda Orders Overdose Alarms For Darvocet
The Food and Drug Administrations decision puts the U.S. in contrast to Britain – which banned the drugs several years ago, citing a trail of suicides and accidental overdoses – and Europes drug regulators, which just recommended that European Union countries do the same.
Known generically as propoxyphene, the 50-year-old prescription drug is widely used in the U.S. even though doctors consider it a weak pain reliever. The consumer watchdog group Public Citizen had petitioned the FDA to ban it here, too, saying the small benefit didnt justify a risk that was adding up to several hundred deaths a year. In January, the FDAs scientific advisers narrowly agreed.
But the FDA overruled its advisers Tuesday, at least for now. It ordered that a stern boxed warning be placed on the drugs label and that patients soon start receiving a special pamphlet with every bottle that stresses the risk of taking too much.
Also Tuesday, the FDA ordered manufacturer Xanodyne Pharmaceuticals Inc. of Newport, Ky., to study the effect of higher-than-recommended doses on patients hearts, saying the findings could lead to additional actions. And the agency is seeking help from Medicare and the Veterans Affairs Department to further study the drugs specific effects in the elderly.
At the recommended dose, “this is an acceptable option for patients,” said agency drug chief Dr. Janet Woodcock. “Alleviating pain is an important medical issue.”
She stressed that other painkillers come with their own side effects. Just last week another panel of FDAs advisers warned against liver damage from overdoses of over-the-counter acetaminophen, the painkiller in Tylenol and numerous other drug brands.
“Were trying to cover all the bases here as far as the pain medicines,” Woodcock said.
As for Darvon and Darvocet, Public Citizen is considering whether to appeal FDAs decision or to sue over it.
“This is a reckless decision on the part of the FDA unless they believe Americans are resistant to the death-causing properties of this drug in a way that Europeans and people in the U.K. arent,” said Public Citizens Dr. Sidney Wolfe. “Youve got a drug which has a barely perceptible benefit and a very clear risk.”
In Web-posted information for consumers Tuesday, the FDA said the drug is used differently in Europe, affecting its decision.
A large enough dose of many pain relievers can kill, making it hard to use medication regulation to guard against suicide.
But Wolfe worries about longtime Darvon and Darvocet users who inch up their dose in hopes of better pain relief. A heart-toxic metabolite of the drug can linger in the body for 30 hours, so as little as one or two extra pills each time a dosage is due could quickly add up to damaging levels, Wolfe said. Too much can eventually interrupt the hearts electrical activity, a deadly condition known as heart block, he said.
Wolfe cited data from the governments Drug Abuse Warning Network, which tracks emergency room visits, that counted 503 Darvon-related deaths in 2007, about 20 percent of them classified as suicides.
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On the Net:
FDA Q&A: http://tinyurl.com/npmo5u