https://www.stlouischildrens.org/health-resources/dosage-tables/acetaminophen-tylenol-dosage-table https://www.stlouischildrens.org/health-resources/dosage-tab.

https://www.stlouischildrens.org/health-resources/dosage-tables/acetaminophen-tylenol-dosage-table https://www.stlouischildrens.org/health-resources/dosage-tab... A typical 500mg adult dosage tablet isn't recommended til the child is > 72lbs. They make smaller tablets. Smaller tablets can also be cut up. And there's liquid preparations that can be tuned to whatever level is needed.