For general pain relief, the standard adult dose of ibuprofen is 200 to 400 mg every four to six hours, with a maximum of 1,200 mg in 24 hours when using over-the-counter strength. That’s three to six of the common 200 mg tablets per day, depending on how you space them. Prescription doses can go higher, up to 3,200 mg per day, but only under a doctor’s supervision.
Standard Adult Doses by Type of Pain
How much you take per dose depends on what you’re treating. For mild to moderate pain like headaches, muscle aches, or toothaches, 400 mg every four to six hours works for most adults. For menstrual cramps, the recommended dose is the same: 400 mg every four hours as needed. In both cases, you take only as much as you need to control the pain and stop when it resolves.
For chronic conditions like osteoarthritis or rheumatoid arthritis, doctors sometimes prescribe between 1,200 and 3,200 mg per day, split into three or four doses. These higher amounts carry more risk and require medical monitoring, particularly for stomach and kidney health. The over-the-counter ceiling of 1,200 mg per day exists specifically because self-treating at higher doses increases the chance of side effects significantly.
How Long You Can Take It
Duration matters just as much as dose. For pain, you shouldn’t take ibuprofen for more than 10 consecutive days without medical guidance. For fever, that limit drops to three days. If your symptoms haven’t improved within those windows, the underlying cause likely needs a different approach.
Timing and Spacing Between Doses
The minimum gap between doses is four hours, though six hours is a safer default for most people. Taking doses too close together is one of the easiest ways to accidentally exceed the daily limit. If you’re taking 400 mg every four hours, you’ll hit 1,200 mg after just three doses, so you’d need to stop for the rest of the day.
A common question is whether you need to take ibuprofen with food. At standard over-the-counter doses (up to 1,200 mg per day for a week or less), taking it on an empty stomach is safe and actually provides faster pain relief. Food slows absorption without changing how much your body ultimately takes in. There’s no strong scientific evidence that eating with your dose prevents stomach irritation at these lower amounts. At prescription-level doses above 1,200 mg per day, however, the risk of stomach problems increases two to three times, and taking it with food becomes more important.
Children’s Dosing
Children’s doses are based on weight, not age, though age can serve as a rough guide if you don’t have an accurate weight. Ibuprofen should not be given to babies younger than 6 months old unless specifically directed by a pediatrician, as it hasn’t been established as safe for that age group. For older children, doses can be repeated every six to eight hours as needed, which is a longer interval than the adult schedule. The adult dose of 400 mg applies once a child is old enough and heavy enough, typically in the teenage years.
Who Should Take Less or Avoid It Entirely
Several conditions change the math on ibuprofen safety. People with kidney disease, a history of stomach ulcers, or cardiovascular problems face higher risks even at standard doses. Ibuprofen affects how platelets work and can interfere with normal blood clotting, which becomes dangerous if you’re already on blood thinners like warfarin or daily aspirin. Combining ibuprofen with these medications raises bleeding risk, especially in the digestive tract.
If you’re pregnant, ibuprofen is generally off the table. Its safety during the first trimester is unclear, and taking it during the third trimester may lead to birth defects. In limited cases, a doctor might recommend it during the second trimester for something like a migraine that doesn’t respond to acetaminophen, but only for 48 hours or less at a time. For most pregnant people, acetaminophen is the safer choice for pain and fever.
Signs You’ve Taken Too Much
Ibuprofen overdose is dose-dependent, meaning symptoms escalate with the amount taken. Nausea, vomiting, stomach pain, and diarrhea are the earliest warning signs. At significantly higher amounts, kidney damage becomes a concern, and at extreme doses, neurological symptoms like seizures or loss of consciousness can occur. If you suspect an overdose, contact poison control or emergency services immediately rather than waiting to see if symptoms develop. The risk isn’t just from a single large dose. Taking moderately high amounts day after day can quietly cause stomach bleeding or kidney strain before you notice obvious symptoms, which is why the 10-day self-treatment limit exists.