Ibuprofen and Acetaminophen Dosing Safety
The short answer
Acetaminophen (Tylenol) can be given to babies 2 months and older. Ibuprofen (Motrin/Advil) should NOT be given to babies under 6 months. Dosing is based on your child's WEIGHT, not age - always use the dosing syringe that comes with the product and follow the weight-based chart on the packaging. Never give aspirin to children under 18 (risk of Reye syndrome). When in doubt about dosing, call your pediatrician. Alternating acetaminophen and ibuprofen can be effective for fever but increases the risk of dosing errors - only do this under your pediatrician's guidance.
By Age
What to expect by age
Acetaminophen (Tylenol) can be used from age 2 months, dosed by weight. Ibuprofen (Motrin/Advil) is NOT recommended for babies under 6 months because their kidneys are immature. Always use infant-concentration products (NOT children's formulation, which is a different concentration). Use the dosing syringe provided - kitchen spoons are inaccurate. Give doses no more frequently than: acetaminophen every 4-6 hours (max 5 doses in 24 hours), ibuprofen every 6-8 hours (max 4 doses in 24 hours). If your baby under 3 months has a fever, do not just give medication - call your pediatrician or go to the ER immediately.
Both acetaminophen and ibuprofen are safe for toddlers when dosed correctly by weight. Common mistakes to avoid: using adult formulations, estimating doses with kitchen spoons, giving doses too frequently, and giving both medications without tracking which was given when. If alternating medications, keep a written log of what was given and when. Be aware that many cold and flu products contain acetaminophen - giving these along with standalone Tylenol can lead to accidental overdose. Read all ingredient labels. If you think your child received too much medication, call Poison Control (1-800-222-1222) immediately.
What Should You Do?
When to take action
- Using acetaminophen or ibuprofen as needed for fever or pain at the correct dose for your child's weight
- Your child's fever goes down with medication but returns when it wears off (this is expected during illness)
- You are unsure about the correct dose for your child's weight
- You want to discuss alternating acetaminophen and ibuprofen
- Fever is not responding to properly dosed medication
- Your child needs fever medication for more than 3 days continuously
- You think your child may have received too much medication (call Poison Control: 1-800-222-1222)
- Your child is vomiting after taking medication and you are unsure if the dose was absorbed
- Your baby under 3 months has a fever (seek immediate medical care - do not just give medication)
- Signs of acetaminophen overdose: nausea, vomiting, abdominal pain, or yellowing of skin/eyes
Sources
Related Resources
Related Medical Concerns
Baby Has a High Fever Over 104 Degrees F
A fever above 104 degrees F (40 degrees C) in a baby or toddler can be alarming, but the height of the fever alone does not necessarily indicate a more serious illness. Many common childhood viral infections (like roseola) can cause high fevers. What matters more than the number is how your child looks and behaves. A child with a 104 degree F fever who is still alert, making eye contact, and drinking fluids is less concerning than a child with a 102 degree F fever who is limp and unresponsive. However, fevers above 104 degrees F should always be discussed with your pediatrician.
Fever in a Baby Under 3 Months Old
A fever in a baby under 3 months old (temperature of 100.4 degrees F / 38 degrees C or higher taken rectally) is always a medical emergency. Go to the emergency room immediately, regardless of how well your baby appears. Young babies' immune systems cannot fight infections as effectively as older children, and a fever could indicate a serious bacterial infection (urinary tract infection, bacteremia, or meningitis) that needs urgent treatment. Do NOT wait to see if the fever goes down. Do NOT give fever medication and stay home - go to the ER first.
Baby Had an Allergic Reaction to Medicine
Drug allergies in children are less common than many parents think - most "reactions" to medication are actually viral rashes that coincidentally appear while a child is taking antibiotics for an illness. True drug allergy symptoms include hives (raised, itchy welts) that appear within hours of taking the medication, facial or lip swelling, and in rare cases, difficulty breathing. A rash that appears several days into an antibiotic course and is flat, non-itchy, and widespread is more likely a viral exanthem than a true drug allergy. Regardless, stop the medication and contact your pediatrician to help determine if it is a true allergy.
Baby Took Too Many Vitamins or Supplements
If your child has consumed too many vitamins or supplements, call Poison Control immediately at 1-800-222-1222 (US). The most dangerous vitamin/supplement overdose in children is iron, which can cause serious poisoning even from adult multivitamins or prenatal vitamins. Vitamin D overdose can also be harmful. Gummy vitamins that look like candy are a common cause of accidental overdose in toddlers. While most water-soluble vitamins (B, C) are less dangerous in excess, fat-soluble vitamins (A, D, E, K) and minerals (iron, zinc) can accumulate to toxic levels. Keep all vitamins and supplements out of reach of children.
My Baby's Head Shape Looks Abnormal
Many babies develop temporary head shape irregularities that are completely normal. A cone-shaped head from vaginal delivery reshapes within days. Mild positional flattening (plagiocephaly) from sleeping on the back is very common and usually improves with repositioning and tummy time. However, head shape changes involving ridges, a persistently bulging fontanelle, or rapid head growth changes should be evaluated to rule out craniosynostosis.
I'm Worried About Lazy Eye (Amblyopia)
Amblyopia (lazy eye) is the most common cause of vision loss in children, affecting about 2-3% of kids. It occurs when one eye develops weaker vision because the brain favors the other eye. The tricky part is that amblyopia often has no obvious outward signs - the eye usually looks normal. Early detection through routine vision screening is critical because treatment is most effective in the first few years of life.