If you give your baby acetaminophen to reduce fever and pain, pay close attention to the packaging.

Several months ago, we reported about the FDA’s interest in more accurate dosing information for children’s Tylenol . It’s still a hot topic. Last week, the feds issued a warning about the potential for dosing errors with liquid acetaminophen for infants. As explained on MedPage Today, in 2009 the FDA recommended introducing a new, single strength version of the drug. Adverse event reports from babies given the drug indicated that the problem was dosing errors.

Many manufacturers who made liquid acetaminophen in different strengths agreed to produce only a single concentration—160 mg/5 mL. The quantities refer to how much of the active ingredient (160 mg) is in each dose (5 mL). But the effort to simplify appears to have complicated things.