UNDATED (CBS NEWS) -- A warning from the Food and Drug Administration concerning a popular pain reliever.
The agency is asking doctors to stop prescribing combination drugs that contain large doses of acetaminophen.
Patients sometimes take drugs that combine acetaminophen and other pain killers after dental procedures, surgeries or injuries.
Now the FDA is asking doctors to stop prescribing combination medications that contain more than 325 miligrams of acetaminophen.
Doctor William Cooper of Vanderbilt University was on a committee that made some of the recommendations. He says patients often overdose on the drug by mistake.
" they'll take it as prescribed but they may not have complete pain relief so they'll take an additional Tylenol product or some other product on top of that. Those doses of acetaminophen when higher are one of the most common causes of liver damage in the United States."
That damage can lead to liver transplants even death. Acetaminophen is found in more than 600 medications, including many over the counter products.
In 2011, the FDA asked drug manufacturers to lower the amount of acetaminophen in combination medications. While many have complied, some higher dose drugs are still on the market.
The FDA is now urging pharmacists to contact doctors if a patient tries to fill a prescription with the higher dosage.
Bigad Shaban cbs news.
With acetaminophen found in so many products, the FDA says it will address over-the-counter use in a future report.