You should only take ibuprofen exactly as directed on your package or by a doctor, and if you’re unsure, call a medical professional or poison helpline right away. I can give general ranges, but this is not personal medical advice.

Fast answer: common adult dosing

For most healthy adults using over‑the‑counter (OTC) ibuprofen:

  • Typical single dose: 200–400 mg (usually 1–2 standard 200 mg tablets) every 4–6 hours as needed for pain or fever.
  • Do not exceed 1,200 mg per day from OTC products unless a clinician has specifically prescribed a higher amount.
  • Prescription regimens may go higher (up to 3,200 mg/day in divided doses) but only under close medical supervision because of higher risk of side effects.

If you are asking because you already took some and are worried you took too much, contact your local poison center or emergency services now rather than waiting.

Key safety rules (read this before taking more)

  • Always use the lowest effective dose for the shortest time to control your symptoms.
  • Do not take ibuprofen if you have a known allergy to ibuprofen, aspirin, or other NSAIDs, or you’ve had asthma attacks from them before.
  • Avoid ibuprofen or get urgent medical advice first if you:
    • Have kidney disease, a history of stomach ulcers or bleeding, or severe heart disease.
* Are pregnant (especially in the 3rd trimester) or have liver disease, because risks can be higher.

Never combine multiple ibuprofen products (like tablets plus “cold and flu” combo meds that also contain ibuprofen) without checking the labels; it’s very easy to exceed the daily maximum this way.

Children and teens: dosing is different

If your question is about a child or teenager, you must follow child‑specific dosing based on weight , not just age:

  • Typical pediatric doses use about 5–10 mg per kilogram of body weight per dose, given every 6–8 hours, with a maximum of about 40 mg/kg per day.
  • Most children’s ibuprofen bottles include a weight‑based chart; if you don’t have the bottle or chart, call a pediatrician or poison center instead of guessing.

Never give ibuprofen to an infant under the labeled minimum age without direct doctor guidance.

Signs you may have taken too much

Taking more than recommended — especially large single doses or high daily totals — can cause serious harm:

  • Early symptoms may include nausea, vomiting, stomach pain, heartburn, dizziness, or drowsiness.
  • Severe overdose can lead to stomach bleeding, dangerously low blood pressure, kidney failure, confusion, seizures, or coma in extreme cases.

If you or someone else has taken a large amount (for example, handfuls of tablets, or you’ve lost count) or has worrying symptoms, seek emergency care or call a poison center immediately; do not wait for symptoms to “see what happens”.

How to decide what to do right now

Ask yourself these questions:

  1. What strength are the tablets?
    • Most OTC tablets are 200 mg, but some prescription tablets are 400, 600, or 800 mg.
  1. How many tablets have you taken in the last 24 hours?
    • Multiply number of tablets × mg per tablet to get your total mg.
    • If you’re over 1,200 mg as an adult without a prescription, or over a child’s weight‑based limit, call for medical advice now.
  1. Do you have any medical conditions or other meds that increase risk?
    • Blood thinners, certain blood pressure meds, diuretics, or other NSAIDs can all increase the danger of problems with ibuprofen.

If you can’t answer these clearly, err on the side of caution and call a professional.

“Quick Scoop” recap

  • Most adults: 200–400 mg every 4–6 hours , up to 1,200 mg/day without a specific prescription.
  • Higher daily doses (up to 3,200 mg/day) are prescription‑only and need medical supervision.
  • Kids: dose depends on weight ; maximum ~40 mg/kg per day.
  • Stomach bleeding, kidney injury, and serious overdose are possible if you take too much, take it too often, or have certain health problems.

If your question is about a specific situation (your age, weight, health issues, and what you’ve already taken), tell me those details and I can help you interpret general guidance—but you should still check directly with a doctor or pharmacist.