π Tylenol (Acetaminophen) Dosage Reference
Label ranges by age and weight, with daily caps.
Label dosing range
For informational purposes only, not medical advice.
Acetaminophen dosing is weight-based in children, 10 to 15 mg per kilogram every 4 to 6 hours, and fixed-range in adults, 325 to 1000 mg per dose. A 20 kg child therefore takes 200 to 300 mg per dose, up to 5 doses a day and no more than 75 mg/kg daily. Adults should stay at or under 3,000 mg per day from all sources combined. This page reproduces those labeled ranges; your pharmacist confirms them for you personally.
Acetaminophen is the most common cause of acute liver failure in the US, and most cases come from accidental excess, not intentional overdose: extra-strength tablets plus cold medicine plus a nighttime dose, each innocent alone. The daily cap is the number that prevents that arithmetic.
How to Use This Reference
Choose adult or child, enter the child's weight if relevant, and read the per-dose range with the daily maximum. Then check every other medicine in the house for hidden acetaminophen.
Select adult or child. For children, enter weight in kilograms.
Read the single-dose range, the minimum interval, and the maximum per day.
Add up all sources. If cold, flu, or sleep medicines are in play, their acetaminophen counts toward the same cap.
Label Ranges
The 3,000 mg adult recommendation tightened from 4,000 in 2011 after FDA review showed most liver injuries came from unintentional excess. Many labels still print 4,000 as the absolute ceiling, but liver specialists advise treating 3,000 as the practical limit, lower with regular alcohol use or liver disease.
For children, the syringe matters as much as the math: kitchen spoons vary wildly, and concentrated infant drops were reformulated years ago to match children's suspension strength precisely because concentration confusion caused overdoses. Measure with the device in the box.
Worked Example
A 20 kg child with fever: 10 mg/kg gives 200 mg, 15 mg/kg gives 300 mg, so the per-dose range is 200 to 300 mg every 4 to 6 hours. The daily cap is 75 times 20, or 1,500 mg, which allows five 300 mg doses at most.
An adult taking two 500 mg extra-strength tablets every 6 hours hits 4,000 mg a day, above the recommended 3,000. Dropping to every 8 hours, or to 650 mg doses, brings the day back inside the safer range. That is the kind of arithmetic this page is for.
Reading Your Result
| Situation | Rule |
|---|---|
| Single adult dose | 325 to 1000 mg, at least 4 hours apart. |
| Adult daily total | 3,000 mg recommended maximum from every source combined. |
| Child single dose | 10 to 15 mg/kg, at least 4 hours apart, max 5 doses daily. |
| Child daily total | 75 mg/kg per day maximum. |
My take: the hidden-acetaminophen audit matters more than the dose math. Pull every bottle from the cabinet, read the active ingredients, and add them up. Most accidental overdoses I have read about were combination products, not the Tylenol bottle itself.
Overdose Warning
Early acetaminophen overdose causes few symptoms, which is what makes it dangerous: liver injury declares itself a day or more later, when the antidote window is narrowing. If too much was taken, call Poison Control at 1-800-222-1222 or seek emergency care immediately, and see our acetaminophen overdose guide for the toxic thresholds. Do not wait for symptoms.
Related Tools
For the toxic side see the acetaminophen overdose guide, compare pain options with the tramadol dosage reference, and track vitals with the blood pressure checker.
For informational purposes only, not medical advice. Consult a healthcare professional.
Frequently Asked Questions
How much Tylenol can adults take per day?
The recommended maximum is 3,000 mg per day from all sources combined, though many labels still list 4,000 mg as the absolute ceiling. People who drink regularly or have liver disease should use less and ask their doctor.
What is the children's Tylenol dose by weight?
10 to 15 mg per kilogram every 4 to 6 hours, up to 5 doses per day, max 75 mg/kg per day. A 20 kg child takes 200-300 mg per dose. Always measure with the dosing syringe provided.
How often can you take acetaminophen?
Every 4 to 6 hours as needed, with at least 4 hours between doses and no more than 5 doses in 24 hours for children. More frequent dosing does not improve effect and raises liver risk.
Which medicines contain hidden acetaminophen?
Many cold, flu, allergy, sleep, and prescription pain medicines list it as APAP. Vicodin, Percocet, NyQuil, DayQuil, and Theraflu all contain it. Always read active ingredients and count every source toward the daily cap.
Is 4,000 mg of acetaminophen safe?
It is the labeled absolute ceiling on many products, but liver specialists recommend 3,000 mg as the practical daily limit since most injuries come from unintentional excess. Stay at or under 3,000 unless your doctor advises otherwise.
Can you take Tylenol on an empty stomach?
Yes, unlike NSAIDs it does not irritate the stomach lining directly. Food does not meaningfully change its absorption. People with liver concerns should still confirm use with their doctor.
What is the difference between Tylenol and ibuprofen?
Acetaminophen reduces pain and fever with minimal anti-inflammatory effect and no stomach or bleeding risks; ibuprofen is anti-inflammatory but can irritate the stomach and affect kidneys. They work differently and are sometimes alternated under guidance.
How should infant acetaminophen be measured?
With the oral syringe in the package, never a kitchen spoon. Infant and children's suspensions now share one concentration, but always verify the mg per mL on your bottle and dose by weight.
What should I do if I took too much?
Call Poison Control at 1-800-222-1222 or go to emergency care immediately, even feeling fine. Early overdose has few symptoms while liver injury develops silently. Bring the bottles.
Does this page prescribe my dose?
No. It reproduces standard labeled ranges for reference. Your pharmacist or prescriber confirms what is right for you, especially with liver disease, alcohol use, pregnancy, or other medications.