In the United States, the right Tylenol dose depends on your baby’s weight, age, and the product strength. Most children’s and infants’ liquid acetaminophen in the U.S. now contains 160 mg per 5 mL.
For babies younger than 12 weeks (3 months), call your pediatrician before giving Tylenol. A fever in a baby this young needs medical advice, even if the baby seems well.
For babies 3 months and older, use the weight-based chart below only when the bottle says acetaminophen 160 mg per 5 mL. Use an oral syringe, not a kitchen spoon.
Tylenol dosage chart for babies and children
The table below gives common U.S. doses for liquid acetaminophen with a strength of 160 mg per 5 mL. The dose is based on weight, not age alone.
| Child’s weight | Liquid Tylenol dose | Important note |
|---|---|---|
| 6–11 lb | 1.25 mL | Under 12 weeks: ask a doctor first |
| 12–17 lb | 1.875 mL | Ask your child’s doctor if under 6 months |
| 18–23 lb | 2.5 mL | Use an oral syringe |
| 24–35 lb | 3.75 mL | Do not use a kitchen spoon |
| 36–47 lb | 5 mL | Check the product strength |
| 48–59 lb | 7.5 mL | Follow the label or clinician’s advice |
| 60–71 lb | 10 mL | Do not exceed the daily limit |
| 72–95 lb | 12.5 mL | Use only the stated concentration |
| 96 lb or more | 15 mL | Ask a clinician about the best dose |
Give the dose every 4 to 6 hours as needed. Do not give more than 5 doses in 24 hours, unless your child’s doctor gives different instructions.
This chart is for acetaminophen 160 mg per 5 mL only. Some older products, imported products, or prescription liquids may have a different concentration. Always read the Drug Facts label before measuring a dose.
Why weight matters more than age
Babies the same age may have very different weights. Acetaminophen dosing is usually calculated by weight because weight gives a better guide to the amount a child can safely receive.
A commonly used pediatric range is about 10–15 mg of acetaminophen per kilogram of body weight per dose. Do not calculate a dose yourself if you are unsure of your baby’s weight, the product strength, or the correct interval. Ask a pediatrician or pharmacist.
How to give Tylenol safely
Follow these steps each time:
- Check the active ingredient. It should say acetaminophen.
- Check the concentration. For the chart above, it must say 160 mg per 5 mL.
- Weigh your baby if possible. Use a recent, accurate weight.
- Measure with the supplied oral syringe. A syringe gives a more exact dose than a spoon.
- Give the medicine slowly. Place the syringe inside the cheek and press it gently.
- Write down the time and amount. This helps prevent an accidental repeat dose.
- Wait at least 4 hours before another dose. Do not exceed 5 doses in 24 hours.
You can give liquid Tylenol with or without food. If your baby spits up right after taking it, do not automatically repeat the dose. Some or all of the medicine may already have been swallowed. Call a pharmacist or your child’s doctor for advice.
Use milliliters, not teaspoons
Use mL markings on the oral syringe. Teaspoons can vary in size, and confusion between teaspoons and milliliters can cause a serious overdose.
For example:
- 1 teaspoon = 5 mL
- ½ teaspoon = 2.5 mL
- ¼ teaspoon = 1.25 mL
These conversions are for understanding only. Use the syringe that comes with the medicine whenever possible.
Do not use household spoons
A kitchen teaspoon may hold more or less than 5 mL. That small difference can matter in a baby. If the package does not include an oral syringe, ask a pharmacy for one.
When can a baby have Tylenol?
The U.S. Food and Drug Administration and product labels advise parents to ask a doctor before giving acetaminophen to a child younger than 2 years. In practice, a pediatric clinician may recommend acetaminophen for some babies 3 months and older.
For a baby under 12 weeks, call the doctor before giving any fever medicine. A temperature of 100.4°F (38°C) or higher in a baby younger than 3 months needs prompt medical advice.
Do not give Tylenol just to prevent a fever after a vaccine unless your child’s clinician tells you to. Medicine may be useful if the baby later has pain or fever, but preventive dosing is not right for every child.
Tylenol and teething
Tylenol may help with short-term pain, but teething does not usually cause a high fever. If your baby has a temperature of 100.4°F or higher, poor feeding, breathing trouble, unusual sleepiness, or other signs of illness, call the child’s doctor rather than assuming the symptoms are from teething.
When should I call a doctor about my baby’s fever?
Call your child’s doctor promptly if:
- Your baby is younger than 3 months and has a temperature of 100.4°F (38°C) or higher.
- Your baby is hard to wake, unusually limp, or not acting normally.
- Your baby has trouble breathing, blue or gray lips, or severe wheezing.
- Your baby is not feeding well or has fewer wet diapers.
- Your baby has repeated vomiting or diarrhea.
- Your baby has a seizure, stiff neck, or a spreading purple or red rash.
- The fever lasts more than a day in a young infant or your child is getting worse.
- You are worried, even if the temperature is not very high.
Call 911 for severe breathing problems, unresponsiveness, a seizure that does not stop, or blue or gray skin.
A fever is a symptom, not a disease. Tylenol can lower pain or fever, but it does not treat the infection causing it. Do not delay medical care because the temperature drops after medicine.
When should a baby not take Tylenol?
Ask a doctor or pharmacist before giving Tylenol if your baby:
- Has liver disease.
- Is severely dehydrated.
- Has repeated vomiting or cannot keep fluids down.
- Has had an allergic reaction to acetaminophen.
- Takes other medicines.
- Was born very prematurely or has a complex medical condition.
- May already have received acetaminophen from another caregiver.
Never give Tylenol with another medicine that also contains acetaminophen. Many children’s cold, cough, flu, and pain products may contain it.
Look for these names on labels:
- Acetaminophen
- APAP
- Paracetamol
In the United States, acetaminophen is the usual label term. Giving two products with the same ingredient can cause an overdose even when each product seems to have a normal dose.
What should I do if I give too much Tylenol?
If you gave more than the recommended amount, gave doses too close together, or are unsure how much your baby received, get help right away. Do not wait for symptoms. Acetaminophen poisoning can harm the liver, and early treatment matters.
In the U.S., call Poison Control at 1-800-222-1222 or use PoisonHelp.org. The service is free and available 24 hours a day.
Have these details ready:
- Your baby’s age and weight.
- The product name.
- The product strength.
- The amount given.
- The time of each dose.
- Any other medicine the baby received.
Do not make your baby vomit. Do not give extra fluids or another medicine unless Poison Control or a clinician tells you to.
Tylenol versus ibuprofen for babies
Ibuprofen is not the same as Tylenol. In the U.S., ibuprofen is generally not used in babies younger than 6 months unless a clinician directs it.
Do not switch between acetaminophen and ibuprofen on your own. Alternating medicines makes it easier to lose track of doses and can lead to mistakes. Ask your child’s doctor before using both.
Aspirin should not be given to children or teenagers unless a doctor specifically prescribes it. It has been linked to Reye’s syndrome, a rare but serious illness.
Common Tylenol dosing mistakes
The most common errors are preventable:
- Using the wrong concentration: Always check for 160 mg per 5 mL.
- Using age instead of weight: Weight is usually the better guide.
- Using a kitchen spoon: Use an oral syringe.
- Giving doses too close together: Wait at least 4 hours.
- Exceeding 5 doses in 24 hours: Track every dose.
- Double-dosing: Check cold, flu, and pain medicines for acetaminophen.
- Guessing after spit-up: Ask a pharmacist before repeating a dose.
- Treating a young infant’s fever at home: Call the doctor first.
- Using expired medicine: Check the expiration date and storage instructions.
A simple written log can help. Record the time, dose in mL, product strength, and the person who gave it.
Frequently asked questions
How much Tylenol can I give a 10-pound baby?
A 10-pound baby falls in the 6–11-pound range. For liquid acetaminophen labeled 160 mg per 5 mL, the chart dose is 1.25 mL. If the baby is younger than 12 weeks, call the pediatrician before giving it.
How much Tylenol can I give a 15-pound baby?
For a 15-pound baby, the chart dose is 1.875 mL of acetaminophen 160 mg per 5 mL. Measure it with an oral syringe. Ask your child’s doctor if the baby is under 6 months or has a medical condition.
Can I give infant Tylenol every 4 hours?
A dose may be given every 4 to 6 hours as needed, but do not give more than 5 doses in 24 hours. Check the label and follow your child’s clinician’s instructions.
Can I give Tylenol to a baby with a fever?
Yes, a clinician may recommend it for some babies, but a baby younger than 3 months with a temperature of 100.4°F (38°C) or higher needs medical advice right away. Tylenol should not replace an evaluation.
Is infant Tylenol stronger than children’s Tylenol?
In the U.S., many infant and children’s liquid acetaminophen products use the same strength: 160 mg per 5 mL. The bottle size and syringe may differ. Never assume the strength—read the label each time.
Key takeaways
- Use your baby’s weight and the product’s concentration.
- The chart above applies only to 160 mg per 5 mL liquid acetaminophen.
- Babies younger than 12 weeks should not receive Tylenol for fever without medical advice.
- Use an oral syringe, not a kitchen spoon.
- Wait 4 to 6 hours between doses and give no more than 5 doses in 24 hours.
- Check all medicines for acetaminophen to prevent double dosing.
- For a possible overdose, call Poison Control at 1-800-222-1222.
Sources
- U.S. Food and Drug Administration: Acetaminophen and children
- American Academy of Pediatrics: Acetaminophen dosing
- Poison Control: Acetaminophen poisoning
Conclusion
For most U.S. liquid Tylenol products, the key strength is 160 mg per 5 mL. Use the baby’s weight to find the dose, measure it with an oral syringe, and keep a written dose log. If your baby is younger than 3 months, has a fever, or may have received too much medicine, contact a medical professional before giving another dose.
