Your Side Effects May IncludeTylenol with Codeine side effects
acetaminophen and codeine
This side effect is printed on the FDA label for Tylenol with Codeine. It was a question in our daily quiz, where you pick the real side effect from four choices.
Some people's bodies turn it into dangerous amounts of morphine
It depends on your genes. A nursing baby has died because the mother was one of these fast processors.
“At least one death was reported in a nursing infant who was exposed to high levels of morphine in breast milk because the mother was an ultra-rapid metabolizer of codeine.”
Get help right away for very slow breathing or extreme sleepiness, and never give it to children unless a doctor says so.
8 reports to the FDA's adverse event system mention slowed breathing. A report is not proof the drug caused it. See the query
From quiz No. 14 · October 8, 2026 · Play that quiz →
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Not medical advice. Don't stop or start a medication because of a quiz. Talk to your doctor or pharmacist. Label text and report counts from openFDA. Not affiliated with any drug maker.