Tylenol toxicity

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Poisonings From a Popular Pain Reliever Are Rising By DEBORAH FRANKLIN, NY

Times

 

Despite more than a decade's worth of research showing that taking too much

of a popular pain reliever can ruin the liver, the number of severe,

unintentional poisonings from the drug is on the rise, a new study reports.

The drug, acetaminophen, is best known under the brand name Tylenol. But

many consumers don't realize that it is also found in widely varying doses

in several hundred common

cold<http://topics.nytimes.com/top/news/health/diseasesconditionsandhealthtopics\

/colds/index.html?inline=nyt-classifier>remedies

and combination pain relievers.

 

These compounds include Excedrin, Midol Teen Formula, Theraflu, Alka-Seltzer

Plus Cold Medicine, and NyQuil Cold and

Flu<http://topics.nytimes.com/top/news/health/diseasesconditionsandhealthtopics/\

influenza/index.html?inline=nyt-classifier>,

as well as other over-the-counter drugs and many prescription narcotics,

like Vicodin and Percocet.

 

The authors of the study, which is appearing in the December issue of

Hepatology, say the combination of acetaminophen's quiet ubiquity in

over-the-counter remedies and its pairing with narcotics in potentially

addictive drugs like Vicodin and Percocet can make it too easy for some

patients to swallow much more than the maximum recommended dose

inadvertently.

 

" It's extremely frustrating to see people come into the hospital who felt

fine several days ago, but now need a new liver, " said Dr. Tim Davern, one

of the authors and a gastroenterologist with the liver

transplant<http://topics.nytimes.com/top/news/health/diseasesconditionsandhealth\

topics/transplants/index.html?inline=nyt-classifier>program

of the University of California at San Francisco. " Most had no idea

that what they were taking could have that sort of effect. " The numbers of

poisonings, however, are still tiny in comparison with the millions of

people who use over-the-counter and prescription drugs with acetaminophen.

 

Dr. Davern and a team of colleagues from other centers led by Dr. Anne

Larson at the University of Washington Medical Center in Seattle, tracked

the 662 consecutive patients who showed up with acute liver failure at 23

transplant centers across the United States from 1998 to 2003.

 

Acetaminophen poisoning was to blame in nearly half the patients, the

scientists found. The proportion of cases linked to the drug rose to 51

percent in 2003 from 28 percent in 1998. Not all the poisonings were

accidental. An estimated 44 percent were

suicide<http://topics.nytimes.com/top/news/health/diseasesconditionsandhealthtop\

ics/suicidesandsuicideattempts/index.html?inline=nyt-classifier>attempts

by people who swallowed fistfuls of pills. " It's a grisly way to

die, " Dr. Davern said, adding that patients who survive sometimes suffer

profound brain damage.

 

But in at least another 48 percent of the cases studied, the liver failed

after a smaller, unintentional assault by the drug over several days. " I see

some young women who have been suffering flulike symptoms for the better

part of a week, and not eating much, " Dr. Davern said. " They start with

Tylenol, and maybe add an over-the-counter flu medicine on top of that, and

pretty soon they've been taking maybe six grams of acetaminophen a day for a

number of days. In rare cases that can be enough to throw them into liver

failure. "

 

Each Extra Strength Tylenol tablet contains half a gram, or 500 milligrams,

of acetaminophen, and

arthritis<http://topics.nytimes.com/top/news/health/diseasesconditionsandhealtht\

opics/arthritisandrheumatism/index.html?inline=nyt-classifier>-strength

versions of the pain reliever contain 650 milligrams. One tablet of Midol

Teen formula contains 500 milligrams of acetaminophen, as does one adult

dose of NyQuil Cold and Flu. One dose of Tylenol Cold and Flu Severe

contains 1,000 milligrams. The recommended maximum daily dose for adults is

4 grams, or 4,000 milligrams.

 

" Part of the problem is that the labeling on many of these drugs is still

crummy, " said Dr. William Lee, a liver specialist at the University of Texas

Southwestern Medical Center in Dallas, who for years has been lobbying the

Food and Drug Administration to make manufacturers put " acetaminophen " in

large letters on the front of any package that contains it, so that as they

reach for the bottle, patients will be more likely to pause and keep track

of exactly how much they are swallowing.

 

Some companies have voluntarily added new warnings about acetaminophen's

risk to the liver, and they should be given credit for that, said Dr.

Charles Ganley, director of the F.D.A.'s Office of Nonprescription Products.

" But labeling isn't where I would like it to be, " Dr. Ganley added.

 

McNeil Consumer & Specialty

Pharmaceuticals<http://topics.nytimes.com/top/news/health/diseasesconditionsandh\

ealthtopics/drugspharmaceuticals/index.html?inline=nyt-classifier>,

a division of Johnson & Johnson, updated the labeling on all its Tylenol

products in 2002 to list all the active ingredients on the front of the

bottle, increase the type size of acetaminophen, and added a label on the

front warning consumers not to use the product with others that contain

acetaminophen, said Kathy Fallon a spokeswoman.

 

" I urge consumers to read the label, " she said. " Anything more than the

recommended dose is an overdose. "

 

Dr. Lee said he was disturbed by a pattern: " that acetaminophen is always

billed as the one to reach to for safety, probably even more so now, with

other pain relievers pulled from the market. "

 

In fact, the drug, when given in precise, appropriate doses is safer for

children and teenagers than aspirin, which can interact with a viral

infection to bring on rare but serious damage to the brain, liver and other

organs in a constellation of symptoms known as Reye's syndrome. And among

adults, low doses of acetaminophen are less likely than aspirin, ibuprofen

or naproxen to eat away at the stomach, aggravate bleeding or harm the

kidneys.

 

Even patients with chronic liver disease are justly advised to take

acetaminophen for the occasional fever, or for the pain of osteoarthritis, a

back injury or other malady, if they keep the total daily dose under about

two grams, Dr. Lee said.

 

Experts agree that a vast majority of people can safely take the four-gram

daily maximum that labels recommend for adults - the equivalent of eight

Extra Strength Tylenol spread across 24 hours - and some people swallow much

more without harm.

 

But by eight grams in a single day, a significant number of people whose

livers have been stressed by a

virus<http://topics.nytimes.com/top/news/health/diseasesconditionsandhealthtopic\

s/viruses/index.html?inline=nyt-classifier>,

medication, alcohol or other factors would run into serious trouble, Dr. Lee

said. Without intervention, about half the people who swallowed a single

dose of 12 to 15 grams could die.

 

How much alcohol over what time period is problematic? Recent research

suggests the answer isn't simple. The package labels now warn anyone who

drinks three or more drinks every day to consult a doctor before taking

acetaminophen, but Dr. Lee thinks that people who are sober during the week

but binge on weekends may be vulnerable, too.

 

The few days of fasting that can accompany a bad stomach bug also seem to

increase the liver's vulnerability to acetaminophen. And though safe levels

of the drug for large men may, in general, be higher than those for small

women, obese people aren't protected; extra fat in the liver seems to prime

the organ for further damage.

 

Nearly two-thirds of the people in the transplant center study who

unintentionally poisoned themselves were taking one or another of the

roughly 200 prescription drugs that contain acetaminophen plus an opiate.

Among the most popularly prescribed drugs in this group include

hydroconebitartrate plus acetaminophen, which is commonly sold as Vicodin,

and oxycodone hydrochloride plus acetaminophen, better known as Percocet.

 

While these acetaminophen/opiate combination drugs can be very effective in

curbing pain after surgery or injury, some patients who take the drugs

chronically soon find they need increasing amounts to achieve the same level

of pain relief.

 

Because the narcotic part of the compound can be addictive, its accompanying

doses of acetaminophen climb sky high in lock step. The liver may keep pace

with gradual increases of the drug initially, only to suddenly crash months

later. It is the acetaminophen that kills the liver.

 

Lynne Gong of San Jose, Calif., watched her 28-year-old daughter, Leah,

nearly die last summer after that sort of crash. What had started out as a

treatment for the pain of a dislocated shoulder and subsequent surgery had

escalated over two years to a full-blown addiction.

 

After her daughter was hospitalized, Ms. Gong said she found herself warning

friends, neighbors " and anyone else who would listen " that they needed to

closely monitor their own intake of acetaminophen and that of their

children.

 

Some dangers lurk in surprising corners. One day, after Lynne Gong told the

women in her prayer group about Leah's experience, a member went home and,

after a little investigating of her own, discovered that her 12-year-old son

and his friends had started nipping NyQuil on Friday nights for the alcohol

content, in hopes of getting drunk.

 

There are 9.8 grams of acetaminophen in a 10-ounce bottle of NyQuil, Ms.

Gong said. " Everyone really needs to be more aware. "