Alternating Tylenol and Motrin can bring a child's temperature down a little further than one medicine alone, but it has not been shown to make kids reliably more comfortable, and it adds a risk of giving too much. The American Academy of Pediatrics' parent site, HealthyChildren.org, says not to use both together. If your pediatrician has told you to alternate, keep each medicine on its own label clock: Tylenol no sooner than every 4 hours, Motrin every 6 to 8 hours.
That answer comes from a 2013 Cochrane review of the trials, the AAP's clinical report on fever, and the Children's Tylenol and Children's Motrin labels. Below: what each says, and how to know which medicine you gave last at 3am.
Get help now, before any more medicine, if:
- Your baby is under 12 weeks old and has a fever. The HealthyChildren.org (AAP) symptom checker says: "do NOT give your baby any fever medicine before being seen."
- Your child can't wake up, is struggling to breathe, or has purple or blood-colored spots on the skin. Call 911.
- The fever is higher than 104°F, your child had a seizure, has a stiff neck, or is confused or "out of it."
- There's been no urine in more than 8 hours, or your child has a very dry mouth and no tears.
- Your child cries nonstop, or cries when touched or moved.
This article provides general information about medication management and is not a substitute for professional medical advice. Consult your doctor or pharmacist for advice specific to your medications, including the right amount for your child's weight.
Is Alternating Tylenol and Motrin Safe?
The AAP's parent site is the bluntest. Its fever symptom checker on HealthyChildren.org says: "Do not use both acetaminophen and ibuprofen together. Reason: not needed and a risk of giving too much."
The AAP's 2011 report for pediatricians is more mixed. It says "there is evidence that combining these 2 products is more effective than the use of a single agent alone; however, there are concerns that combined treatment may be more complicated and contribute to the unsafe use of these drugs." It also says the main goal is the child's comfort, not a normal number on the thermometer.
The UK's national guideline, NICE, leaves a narrow door open: "only consider alternating these agents if the distress persists or recurs before the next dose is due." It also says to keep giving either one only "as long as the child appears distressed."
And the Cochrane reviewers found no serious side effects in the trials linked to the medicines. They still flagged that "safety concerns have been raised about caregivers giving inappropriate doses and getting confused over when the next dose is due."
So the main worry in these sources isn't the two drugs reacting with each other. It's a tired parent losing track of two clocks.
Plenty of parents alternate because a doctor told them to. In one survey of 256 caregivers, 67% alternated, and 81% of those said a health care provider advised it. Only 61% had received written dosing instructions. And in a survey of 161 pediatricians, half advised parents to alternate, and "the method of alternation varied." If you've heard different rules from different people, that's why.
Does Alternating Tylenol and Motrin Work Better?
On the thermometer, a little. On how your child feels, the evidence is weak.
The Cochrane review found that giving the second medicine when the fever comes back may lower the temperature about 0.6°C (about 1°F) more, one hour after that second dose. That result came from just two small trials with 78 children, and the reviewers rated the evidence low quality. One larger trial in the review (480 children) did find lower pain scores with alternating, but that evidence was also rated low quality. Overall, the reviewers wrote that "the evidence for improvements in measures of child discomfort remains inconclusive."
Other trials point the same way:
- A 2017 trial of 474 children found fewer kids with a stubborn fever on alternating, but no difference in distress scores over 24 hours.
- A 2024 analysis of 31 trials with 5,009 children found alternating and combined treatment may beat acetaminophen alone at getting kids fever-free by hour 4. The analysis only looked at the first 6 hours.
The HealthyChildren.org symptom checker adds that fever medicine usually lowers a fever by 2 to 3°F, not to normal, and that fevers of 100 to 102°F help fight infection and don't need medicine. The under-12-weeks rule above still applies at any temperature.
How Often Can You Alternate Tylenol and Motrin?
The labels set the limits. Each medicine keeps its own minimum gap and daily cap, no matter what you give in between.
| Label rule | Tylenol (acetaminophen) | Motrin (ibuprofen) |
|---|---|---|
| Repeat no sooner than | Every 4 hours | Every 6 to 8 hours |
| Most doses in 24 hours | 5 | 4 |
| Children's product, under 2 years | Ask a doctor | Ask a doctor |
| Infant product, youngest age on chart | Under 2 years: ask a doctor | Under 6 months: ask a doctor |
| Hidden in other products? | Yes. The label says not to use it with any other acetaminophen product | Label says other NSAIDs (aspirin, ibuprofen, naproxen) raise the risk of stomach bleeding |
| Stop and call if fever lasts | More than 3 days | More than 3 days |
Sources: Children's Tylenol label, Children's Motrin label, Infants' Tylenol label, Infants' Motrin label.
Here's what common alternating gaps do to each medicine's clock. This is math on the label rules, not a schedule to follow:
| Gap between the two medicines | Each medicine repeats every | Motrin doses in 24 hours | Fits both labels? |
|---|---|---|---|
| Every 2 hours | 4 hours | 6 | No. Motrin comes too soon and too often |
| Every 3 hours | 6 hours | 4 | Yes, at the edge of Motrin's daily cap |
| Every 4 hours | 8 hours | 3 | Yes |
The every-2-hours pattern isn't rare. In the caregiver survey, 9% of parents who alternated reported doing it "every 2 hours," 16% every 3 hours, and 43% every 4 hours. If that means switching medicines every 2 hours, our math on the label puts Motrin every 4 hours, well short of the 6 to 8 hours the label lists.
NICE also doesn't describe a round-the-clock rotation. It describes giving one medicine, and reaching for the other only if your child is still miserable before the next dose of the first is due. If your child is comfortable, the guideline's logic is that there's no need for another dose. Your pediatrician or pharmacist should set the actual plan for your child.
Can You Give Tylenol and Motrin at the Same Time?
NICE says "do not give both agents simultaneously," and the HealthyChildren.org symptom checker says not to use both together. The Children's Motrin label also says to ask a doctor or pharmacist first if your child is "taking any other drug." Ask your pediatrician or pharmacist before using both.
If you think you gave an extra dose of either, see what to do after a double dose of Motrin or a double dose of Tylenol.
Alternating Tylenol and Motrin for a Baby or Toddler
- Under 12 weeks old: no fever medicine before a doctor sees your baby. Call first.
- Under 6 months, the Infants' Motrin label says "ask a doctor," so alternating isn't something to start on your own. Our guide to Tylenol or Motrin for infant fever walks through each age band.
- For kids under 2, both Children's labels start their dosing charts with "under 2 years: ask a doctor." Get the amount for your child's weight from your pediatrician or pharmacist, and write it down.
- Toddler running hot? Here's what usually happens hour by hour with a toddler fever of 103.
Motrin's label says to ask a doctor first if your child "has not been drinking fluids" or "has lost a lot of fluid due to vomiting or diarrhea." If your toddler is throwing up, read what to do when a child throws up medicine before giving another dose. And use only the dosing device that comes with each product, never a kitchen spoon.
Tylenol and Motrin Alternating Chart for Kids: What to Write Down
A chart that only lists times isn't enough. Record this every time:
| Write down | Why it matters |
|---|---|
| Clock time given | Each medicine's next dose is counted from its own last dose |
| Which medicine | "The purple one" at 2am is not a record |
| Amount given | Use the amount your pediatrician or pharmacist gave you for your child's weight |
| Temperature and how your child seems | Comfort, not the number, decides whether another dose is needed |
| Who gave it | Two caregivers without a shared note is how double doses happen |
| Other medicines today | Other medicines can contain acetaminophen or ibuprofen too |
Before each dose, check two things: hours since the last dose of that same medicine, and doses of it in the past 24 hours. If you can't answer both, don't guess. See what to do when you're not sure you gave your child's dose. For overdose worries, the labels list Poison Control: 1-800-222-1222.
Fever Not Going Down With Tylenol and Motrin?
If the fever keeps coming back, the next step is usually a phone call, not more medicine. Call your child's doctor if:
- A fever with no other symptoms lasts more than 48 hours, a fever with other symptoms lasts more than 3 days, or the fever comes back after being gone for more than 24 hours (HealthyChildren.org symptom checker).
- Your child gets no relief within the first 24 hours of taking Motrin (Children's Motrin label).
- Your baby is 3 to 6 months old with any fever.
How Pillo Helps You Keep Two Clocks Straight
Alternating means tracking two schedules while exhausted. Pillo's Dependents feature lets you add your child to your own app with their own medicine list. Set Tylenol and Motrin as two separate medicines so each keeps its own reminder time. The persistent alarm keeps going until you respond, so a 3am reminder doesn't vanish after one sleepy swipe, and the dose history shows when each medicine was last marked as given.
FAQ
How long can you alternate Tylenol and Motrin?
NICE says to keep giving fever medicine only as long as your child seems distressed. The HealthyChildren.org symptom checker says to call your doctor if a fever with no other symptoms lasts more than 48 hours, or more than 3 days with other symptoms. Both Children's labels say to stop and ask a doctor if the fever lasts more than 3 days.
Can you alternate Tylenol and Motrin every 3 hours?
An every-3-hour rotation puts each medicine 6 hours apart, which fits both the Tylenol and Motrin labels. It uses all 4 of Motrin's daily doses, so there's no room for an extra one. Only use it if your pediatrician recommended alternating, and get the amounts for your child's weight from them.
Does alternating Tylenol and Motrin prevent febrile seizures?
No. The UK's NICE guideline says fever medicines do not prevent febrile seizures and shouldn't be used for that purpose. If your child has a seizure with a fever, get medical care right away.
Can you alternate Tylenol and Motrin for teething?
Teething isn't a reason to start alternating. The AAP's infant fever checker says research shows that "getting teeth" does not cause fevers, so a baby with a real fever needs the usual age checks above. For teething pain, ask your pediatrician what they recommend.
This article is for informational purposes only and does not constitute medical advice. Always consult your doctor or pharmacist before making any changes to your medication routine. Consult your doctor or pharmacist for advice specific to your medications.
