If you're in the habit of washing down over-the-counter painkillers with a slug of strong coffee or a slurp of soda, you might want to switch to water instead. Mixing large doses of caffeine with acetaminophen, one of the most commonly used painkillers in the United States, could lead to liver damage.

These findings, reported in the October 2007 issue of the journal Chemical Research in Toxicology, were the result of a preliminary laboratory study conducted by scientists at the Univers ...

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