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Published on: 10/27/2026
A single 220mg Aleve (naproxen sodium) tablet is usually below the toxic threshold for most children, but risk rises sharply with weight-based doses above roughly 100mg/kg, and several factors change that calculation. Early warning signs can include stomach pain, nausea, vomiting, drowsiness, headache, blurred vision, or ringing in the ears, while larger ingestions may cause seizures, metabolic acidosis, bleeding, or reduced urine output signaling acute kidney injury. Because naproxen reduces blood flow to the kidneys, dehydration, a child under 2, repeated dosing, or existing kidney issues can make even small amounts more dangerous. Important details on dose estimation, timing of symptoms, and when emergency care is needed are explained below.
If your child swallowed adult Aleve and you are unsure how serious it is, a free, instant, online symptom check can help you organize what happened, flag the signs that need urgent attention, and decide on next steps in minutes.
Last reviewed for medical accuracy: 10/27/2026
If your child accidentally took adult Aleve, try to stay calm, but take the situation seriously. Aleve contains naproxen, a nonsteroidal anti-inflammatory drug (NSAID). One adult Aleve tablet contains 220 mg of naproxen sodium.
A single 220 mg tablet does not usually cause serious poisoning in an otherwise healthy older child, but the risk depends on the child’s age, weight, medical history, the amount taken, and whether other medicines were also used. Infants, toddlers, and children with kidney disease, dehydration, stomach ulcers, or other health problems need more careful assessment.
Do not make the child vomit. Do not give activated charcoal unless a poison specialist or emergency clinician specifically instructs you to do so. Avoid giving more pain relievers until you have spoken with a healthcare professional.
You may also consider a free, online symptom check, using the doctor approved Ubie Symptom Checker. It should not replace Poison Control or urgent medical care, especially after a possible medicine overdose.
Some children have no symptoms after taking one tablet. If symptoms occur, they may begin within several hours, although serious complications can sometimes develop later.
Possible early symptoms include:
Larger amounts can cause more significant effects, such as severe drowsiness, confusion, unsteady walking, agitation, blurred vision, or difficulty breathing. Serious NSAID poisoning can affect the stomach, brain, blood pressure, and kidneys.
Seek emergency medical help now if the child has:
If any of these symptoms are present, speak to a doctor or emergency clinician immediately. Do not wait for symptoms to become worse.
Naproxen and other NSAIDs reduce the production of substances called prostaglandins. These substances help maintain blood flow to the kidneys. In some situations, blocking them can reduce kidney blood flow and cause acute kidney injury.
The kidney risk is higher when a child:
A single 220 mg tablet is less likely to cause kidney injury in a healthy child than repeated doses or a large overdose. However, the risk cannot be judged by the tablet strength alone. The child’s weight and hydration are important. This is why Poison Control or a clinician may ask for the child’s age, weight, symptoms, medical conditions, and the exact amount taken.
Possible signs of kidney trouble include urinating less often than usual, producing very little urine, dark urine, swelling around the eyes or ankles, unusual tiredness, nausea, or worsening weakness. These symptoms can have other causes, but they require prompt medical advice after a possible naproxen overdose.
Kidney problems may not cause obvious symptoms at first. If a healthcare professional is concerned, they may check blood pressure, urine output, kidney blood tests, and electrolytes. Most children who receive appropriate advice after a small accidental ingestion recover fully.
Not necessarily. “Overdose” means taking more than the recommended amount, but the medical significance varies widely. A 220 mg tablet is an adult over-the-counter strength, not automatically a dangerous dose for every child. A larger child may have a lower risk from one tablet than a small toddler, but there is no reliable way to confirm safety based only on age.
The product label is intended for adults and children 12 years and older. Children younger than 12 should not be given naproxen unless a healthcare professional recommends it. Do not use adult dosing instructions to decide whether a younger child is safe.
Poison specialists commonly assess the amount in relation to body weight and may recommend observation at home, a call to the child’s doctor, or an emergency evaluation. Follow their instructions carefully and keep the medicine package available.
If Poison Control or a doctor says home observation is appropriate:
Do not force fluids if the child is vomiting, very sleepy, choking, or having trouble swallowing. Contact a doctor if symptoms appear, worsen, or do not fit the advice you were given.
Speak to a doctor about any potentially serious or life-threatening symptom, any ingestion involving an infant, an unknown amount, repeated tablets, or a child with kidney disease or dehydration. Medical advice is also important if the child took other medicines at the same time.
When calling, be ready to provide:
Accidental medicine ingestions are common, and getting prompt advice is the safest approach. Put medicines out of reach after the situation is resolved, preferably in a locked cabinet, and avoid describing medicine as candy.
(References)
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