Fever & Infections

Fever Reducers for Kids: Safe Dosing and When to Treat a Fever

KidsMedMom Andrea M., PharmD, BCPPS

15 Oct 2025 — 12 min read

Fever medicine in children

Every kid experiences a fever at some point during childhood. My children, in particular, tend to get them at 3 AM, while on vacation, or during holiday events. There's also the always fun first fever of the school year. Never a dull moment!

When your child has a fever, you might wonder: Should I give Tylenol or Motrin? How much medicine does my child need? And does every fever actually need treatment?

This guide explains fever reducers for kids, when to treat a fever, how to choose between acetaminophen and ibuprofen, and how to safely determine the correct medication dose.

Understanding Fever in Children

A fever is generally defined as a body temperature of 100.4°F (38°C) or higher, although the exact threshold can vary depending on how the temperature is measured. Fever is usually a normal immune response and is rarely an emergency on its own.

Most fevers in children are caused by infections. They can also occur after vaccinations or with other medical conditions. Heatstroke, however, is different from an ordinary fever and is a medical emergency.

When it comes to fever, most pediatricians will tell you to treat the child, not the number!

If your child is drinking, resting, alert, breathing normally, and playing in short bursts, you can often skip medication and focus on hydration and rest.

HealthyChildren.org, the American Academy of Pediatrics (AAP) parent education website, emphasizes comfort over simply lowering the thermometer reading.

Fever reducers can help when a child is uncomfortable, achy, or having trouble resting because of fever. Relieving discomfort may also make it easier for your child to drink fluids.

However, fever reducers do not treat the underlying infection or reliably prevent complications such as dehydration or febrile seizures.

When used at the correct dose and according to the product label or your pediatrician's instructions, acetaminophen and ibuprofen are generally safe and effective for children.

Common Fever Reducers for Children

Two over-the-counter (OTC) medications are routinely recommended to treat fever in kids: acetaminophen (Tylenol) and ibuprofen (Advil, Motrin).

Acetaminophen (Tylenol®)

Acetaminophen lowers fever and relieves pain. It comes in several formulations, including tablets, liquid, chewable tablets, and suppositories. Consult your pediatrician before using suppositories, since dosing and absorption may differ from oral formulations.

Typical pediatric dosing is 10 to 15 mg/kg per dose every 4 to 6 hours as needed. For children younger than 12 years, the AAP recommends no more than 5 doses in 24 hours. Always follow the appropriate product instructions and confirm the correct dose using your child's weight and medication concentration.

These milligram (mg) per kilogram (kg) calculations can be confusing, but children's acetaminophen products include dosing charts to help parents determine the correct amount. Use weight, not age, as a guide whenever possible.

When measuring liquid acetaminophen, use an oral syringe. A marked dosing cup supplied with the product may be appropriate for older children. Household kitchen spoons are not accurate medication measuring devices.

Safety notes for acetaminophen:

Consult your pediatrician before giving acetaminophen to a child under 2 years.
A baby younger than 3 months with a rectal temperature of 100.4°F (38°C) or higher needs prompt medical evaluation.
Children with liver disease may also need individualized recommendations before taking acetaminophen.
Acetaminophen is an ingredient in many combination products. We recommend avoiding combination cough and cold medicines in young children. When treating fever, choose a product containing only the medication your child needs, and always check the active ingredients to avoid duplicates.

Ibuprofen (Advil®, Motrin®)

Ibuprofen lowers fever and relieves pain and inflammation. Typical pediatric dosing is 5 to 10 mg/kg per dose every 6 to 8 hours as needed, with no more than 4 doses in 24 hours.

Like acetaminophen, ibuprofen dosing depends on your child's weight and the product's concentration - follow the dosing chart on the product label!

When measuring liquid ibuprofen, use an oral syringe or the marked measuring device supplied with the medication.

Giving ibuprofen with food or milk may help reduce stomach upset, although it does not eliminate the risk of gastrointestinal side effects.

Ibuprofen is generally not recommended for children younger than 6 months unless directed by a pediatrician. For children under 2 years of age with a fever, consult your pediatrician first.

Safety notes for ibuprofen:

Use special caution with liquid ibuprofen. Two concentrations are commonly available in the United States:
- Children's ibuprofen suspension: 100 mg/5 mL
- Concentrated infant ibuprofen drops: 50 mg/1.25 mL
- These products contain different amounts of medication per milliliter, so the required dose volume differs.
Avoid ibuprofen if your child is dehydrated. Significant vomiting, diarrhea, poor fluid intake, or decreased urination may increase the risk of kidney injury. Contact your pediatrician for guidance if your child is having difficulty staying hydrated.
Do not use if you have a history of ibuprofen or NSAID allergy.
Ask your doctor for advice if your child has a history of kidney disease, bleeding disorders, ulcers, or other GI conditions, or if they have a history of heart or blood pressure disorders.

Non-Medication Approaches

Whether or not your child needs medicine, there are actions you can take to help them when they have a fever.

Stay hydrated! Offer fluids frequently. Options include water, age-appropriate oral rehydration solutions such as Pedialyte, soup, and popsicles. Breast milk or formula remains important for infants; if your baby is fussy and not willing to nurse, offer smaller volumes more often.
Keep the room comfortable. A room that is too warm or too cold can make your child feel worse. Aim for comfort rather than trying to force their temperature down.
Dress your child in light clothing. Offer a light blanket if an older child has chills, and remove layers if they become hot or sweaty. Follow safe sleep guidance for infants, including avoiding loose blankets.
Encourage rest. Quiet activities, naps, and an early bedtime can help children recover. This can be tough with kids! When mine are sick, screen time rules go out the window. Sometimes a movie marathon is just what the doctor ordered!

Avoid rubbing alcohol on the skin or using cold sponge baths to lower fever. These approaches can be uncomfortable and potentially harmful.

Do not give aspirin to children or teenagers for fever because of its association with Reye syndrome.

Proper Dosing Guidelines by Age and Weight

Use your child's current weight to determine the correct dose of fever-reducing medication. Weight-based dosing is generally more accurate than dosing by age alone.

If you do not know your child's weight, some product labels provide age-based guidance, though weight is preferred. If you are uncertain, ask your pediatrician or pharmacist.

Quick note on liquid medication strengths

Acetaminophen liquid for children: 160 mg per 5 mL
Children's ibuprofen suspension: 100 mg per 5 mL
Concentrated infant ibuprofen drops: 50 mg per 1.25 mL

Pharmacist tip: Children's liquid ibuprofen and concentrated infant ibuprofen drops contain different amounts of medication per milliliter. A dose measured for one product cannot automatically be used for the other. Always verify the concentration on your bottle before measuring a dose.

Whenever possible, keep only one formulation or concentration of each medicine in your home. This can help prevent mix-ups, especially when multiple caregivers administer medications.

The same advice applies to chewable tablets and other formulations, which may be available in different strengths.

For detailed dosing information, refer to the AAP's:

Safety Precautions and Common Mistakes

Whenever you give medication to your child, keep the following in mind!

Read the Drug Facts label and dosing instructions
Verify the active ingredient, strength, and correct dose
Use an oral syringe or appropriately marked measuring device such as the cup supplied with the medication
Choose pediatric formulations appropriate for your child's age and weight
Keep a written medication log recording the medicine, dose, and time given
Check combination cough and cold medicines for duplicate ingredients, and avoid using these products whenever possible
Store medications in their original child-resistant containers, up and away from children
Avoid aspirin in children and teenagers unless specifically prescribed for a medical condition

Use fever reducers to improve comfort, not just to lower the number on the thermometer. Unless your pediatrician tells you to, you usually don't need to dose if your child is cheerful and comfortable with a fever.

Alternating or Combining Acetaminophen and Ibuprofen

Can you alternate Tylenol and Motrin when your child's fever won't go down?

Sometimes! But talk to your pediatrician first. Alternating fever reducers isn't routinely recommended for every child.

A 2024 network meta-analysis published in Pediatrics evaluated 31 clinical trials involving 5,009 children. Researchers found that alternating or combining acetaminophen and ibuprofen may reduce fever more effectively than acetaminophen alone during the first several hours.

However, lowering a child's temperature doesn't necessarily mean they feel better. Using two medications also increases the potential for dosing mistakes.

The AAP does not recommend routinely alternating fever reducers as standard fever management. However, a pediatrician may recommend using both medications in certain situations when a child remains very uncomfortable.

For a closer look at the evidence, dosing intervals, and medication safety tips, read our complete guide to Alternating Tylenol and Motrin.

Safe use of fever reducing medication in children

When to Seek Medical Attention

The good news is most fevers can be safely managed at home. Keep the following in mind when monitoring your child's fever:

Seek emergency medical care if your child:

Has severe difficulty breathing, is unresponsive, or is difficult to awaken.
Has a seizure lasting more than 5 minutes, repeated seizures, or a seizure accompanied by breathing difficulties.
Has a fever with a stiff neck, severe headache, or a concerning purple or nonblanching rash.
Shows signs of heatstroke, such as altered mental status after exposure to extreme heat.

Contact your pediatrician promptly if your child:

Is younger than 3 months and has a rectal temperature of 100.4°F (38°C) or higher.
Has a weakened immune system, cancer, a central line, or another condition that makes a fever dangerous.
Has signs of dehydration, such as significantly decreased urination, dry mouth, or difficulty drinking fluids.
Has persistent vomiting, unusual drowsiness, or appears increasingly ill.
Has a fever repeatedly reaching 104°F (40°C) or higher.
Has a fever with an unexplained rash, significant ear pain, sore throat, or other concerning symptoms.
Experiences a first febrile seizure, even if the seizure has stopped.

Call your pediatrician for additional guidance if:

Fever lasts longer than 24 hours in a child younger than 2 years.
Fever lasts longer than 3 days in a child age 2 years or older.
Fever improves and then returns, especially with new or worsening symptoms.
Your child continues to look or act sick even after the fever decreases.
Your child has recurrent or unexplained fevers.

These recommendations are general guidelines. Your child's individual medical history may change this advice; follow your pediatrician's guidance.

And trust your parental instincts! If something about your child's illness doesn't seem right, contact your pediatrician. You know your child best.

Conclusion

Fevers are often a sign that the immune system is doing its job! As long as your child is comfortable, drinking fluids, and resting, fever medication may not be necessary.

When your child is uncomfortable, having pain, or struggling to rest, fever reducers for kids, such as acetaminophen and ibuprofen, can help.

Choose the appropriate medication for your child's age and health needs, dose according to weight and the product label, measure carefully, and keep a record of each dose.

Frequently Asked Questions

What are the safest fever reducers for children?

Acetaminophen (Tylenol) and ibuprofen (Motrin, Advil) are generally safe and effective when used at appropriate doses. Ibuprofen is generally not recommended for children younger than 6 months unless directed by a pediatrician. Consult your pediatrician before giving acetaminophen to children younger than 2 years. Babies younger than 3 months with a rectal temperature of 100.4°F (38°C) or higher need prompt medical evaluation. Avoid aspirin for fever in children.

How do I determine the proper dose for my child?

Use your child's current weight and follow the product's dosing instructions. Typical pediatric doses are 10 to 15 mg/kg every 4 to 6 hours for acetaminophen and 5 to 10 mg/kg every 6 to 8 hours for ibuprofen. For children younger than 12 years, the AAP recommends no more than 5 acetaminophen doses in 24 hours. Ibuprofen is generally limited to 4 doses in 24 hours. Ask your pediatrician or pharmacist if you're unsure about the correct dose or concentration.

Can I alternate between acetaminophen and ibuprofen?

Alternating Tylenol and Motrin may be appropriate for some children when recommended by a pediatrician, but it isn't routinely necessary. Although using both medications may lower fever more effectively than one medication alone, the added complexity increases the risk of dosing errors. If your child remains uncomfortable despite treatment, ask your pediatrician whether alternating medications is appropriate.

What home remedies help reduce fever safely?

Offer plenty of fluids, dress your child in light clothing, maintain a comfortable room temperature, and encourage rest. Avoid rubbing alcohol and cold water sponging.

When should I contact a doctor about my child's fever?

Contact your pediatrician promptly if your baby is younger than 3 months with a rectal temperature of 100.4°F (38°C) or higher, or if your child has concerning symptoms such as dehydration, unusual drowsiness, or difficulty breathing. Call if fever lasts more than 24 hours in a child younger than 2 years or more than 3 days in a child age 2 years or older. Severe breathing problems, unresponsiveness, or other emergency symptoms require immediate medical care.

References:

American Academy of Pediatrics. (2026, January 30). Acetaminophen dosing tables for fever and pain in children. HealthyChildren.org. https://www.healthychildren.org/English/safety-prevention/at-home/medication-safety/Pages/Acetaminophen-for-Fever-and-Pain.aspx

American Academy of Pediatrics. (2024, September 19). Ibuprofen dosing table for fever and pain. HealthyChildren.org. https://www.healthychildren.org/English/safety-prevention/at-home/medication-safety/Pages/Ibuprofen-for-Fever-and-Pain.aspx

American Academy of Pediatrics. (2025, September 23). Fever without fear: Information for parents. HealthyChildren.org. https://www.healthychildren.org/English/health-issues/conditions/fever/Pages/Fever-Without-Fear.aspx

American Academy of Pediatrics. (2022, December 13). Treating your child's fever. HealthyChildren.org. https://www.healthychildren.org/English/health-issues/conditions/fever/Pages/Medications-Used-to-Treat-Fever.aspx

De la Cruz-Mena, J. E., Veroniki, A. A., Acosta-Reyes, J., Estupiñán-Bohórquez, A., Ibarra, J. A., Pana, M. C., Sierra, J. M., & Florez, I. D. (2024). Short-term dual therapy or mono therapy with acetaminophen and ibuprofen for fever: A network meta-analysis. Pediatrics, 154(4), e2023065390. https://doi.org/10.1542/peds.2023-065390

Sullivan, J. E., & Farrar, H. C. (2011). Fever and antipyretic use in children. Pediatrics, 127(3), 580–587. https://doi.org/10.1542/peds.2010-3852