How we check doses

We don’t write our own dosing. Every dose on this site is copied from sources written or reviewed by physicians and public-health agencies, and every number is checked against those sources before a page goes live. The site hasn’t yet been reviewed by a named clinician of our own; when it is, their name will appear here and on every page.

Where the doses come from

• Children’s hospital dose tables: St. Louis Children’s Hospital tables from the Schmitt Pediatric Guidelines, for Tylenol, Motrin, Benadryl, Zyrtec and Claritin.
• Professional guidance: American Academy of Pediatrics reports and guidelines on fever, ear infections and liquid medicine dosing.
• Government sources: the CDC for flu antivirals, and FDA guidance on children’s acetaminophen.
• Drug labels: FDA prescribing information and over-the-counter Drug Facts labels, published on DailyMed.

The sources page lists every reference, and each medicine page lists the ones it uses.

How every number is checked

1. A script downloads each source directly (not a summary of it) and compares it with the site’s data: every cell of every hospital table, and the exact wording of every label instruction we rely on.
2. Any mismatch blocks publishing until it’s fixed or explained. The last full check ran on 2026-09-25, and every value matched.
3. A separate check runs on every build: each liquid dose’s mL must equal its mg at the product’s strength, and every cited source must exist.
4. The calculators were tested against hand calculations, including the age limits where they refuse to show a dose.

Where we chose the more cautious option

Sometimes two trusted sources differ, or a table disagrees with itself. When that happens we take the more cautious reading and say so on the page. For example:

• For children 96 lb and over, we limit Tylenol to 4 doses and Motrin to 3 doses a day, so the total stays within the adult daily maximums printed in the same hospital tables.
• For Benadryl, we follow the package label: no dose is shown under 2 years.
• For Tamiflu prevention, the CDC lists 7 days and the FDA label 10 days, so we show both and point to the prescription.

Corrections

We re-run the source check whenever a source is updated. When we correct an error, we fix the page and update the date its doses were checked.