You can take Motrin 200 mg every 4 to 6 hours as needed, with a maximum of 6 tablets (1,200 mg total) in a 24-hour period. That limit applies to over-the-counter use without a doctor’s guidance. If your pain or fever isn’t controlled within those boundaries, it’s worth talking to a provider rather than taking more.
Standard Dosing Schedule for Adults
For adults and children 12 and older, the standard over-the-counter dose is one 200 mg tablet every 4 to 6 hours while symptoms persist. You can take two tablets (400 mg) at a time if one isn’t enough, but that lowers the number of doses you can safely fit into a day. The hard ceiling is 1,200 mg in 24 hours for self-directed use.
A practical way to think about it: if you take one tablet at a time, you could take up to 6 doses across the day. If you take two tablets at a time, you’re limited to 3 doses. Either way, space them at least 4 hours apart. Taking it with food or a glass of milk can reduce the chance of stomach irritation.
How Long It Takes to Work
Motrin typically starts relieving pain within 30 to 60 minutes of taking it. That lag matters because people sometimes take a second dose too early, thinking the first one didn’t work. Give it a full hour before deciding whether you need more. The relief from a single dose generally lasts 4 to 6 hours, which is why that’s the recommended window between doses.
How Many Days in a Row Is Safe
The NHS recommends not taking ibuprofen for more than 10 consecutive days without medical guidance. Most OTC pain situations, like a headache, muscle strain, or mild fever, should resolve well before that window closes. If you find yourself reaching for Motrin daily for more than a week, the underlying problem likely needs attention rather than continued self-treatment.
Dosing for Children
Children’s dosing works differently. Kids aged 6 months and older can take ibuprofen every 6 to 8 hours as needed, not every 4 hours like adults. The dose is based on the child’s weight, and if you don’t know their weight, age can serve as a rough guide. The American Academy of Pediatrics notes that ibuprofen is not considered safe for infants under 6 months old and is not FDA-approved for that age group.
Children’s Motrin comes in liquid concentrations designed for smaller bodies, so don’t split adult tablets for kids. Use the measuring device that comes with the product, not a kitchen spoon.
Risks of Taking It Too Often
Ibuprofen is safe for most people at recommended doses, but frequency and dose both matter for long-term risk. The three main concerns with overuse are stomach damage, kidney stress, and cardiovascular effects.
Ibuprofen reduces the protective lining of your stomach. Occasional use rarely causes problems, but frequent or high-dose use raises the risk of stomach ulcers and gastrointestinal bleeding. This risk climbs further if you’re also drinking alcohol or taking corticosteroids.
Your kidneys rely on certain chemical signals that ibuprofen suppresses. Short-term use in a healthy person is fine, but regular use, especially when dehydrated, can strain kidney function over time. People with existing kidney disease should avoid ibuprofen entirely.
There is also growing evidence that frequent NSAID use can increase the risk of heart attack, stroke, heart failure, and irregular heart rhythms. The risk rises with higher doses and more frequent use. For people who already have heart disease, this is a more serious concern, but it applies broadly at high enough exposure.
Who Should Avoid Motrin
Some people should skip ibuprofen regardless of the dose. Cleveland Clinic identifies stomach ulcers, gastrointestinal bleeding, and kidney disease as clear reasons to avoid all NSAIDs, including Motrin. People in the third trimester of pregnancy should also avoid it, as it can affect fetal development.
If you take daily low-dose aspirin for heart protection, be aware that ibuprofen can interfere with aspirin’s ability to prevent blood clots. The FDA confirms this interaction and recommends talking to a provider about timing if you need both. Taking ibuprofen occasionally alongside aspirin is not inherently dangerous, but the scheduling matters to preserve aspirin’s cardiovascular benefit.
Prescription Doses Are Higher
The 1,200 mg daily limit applies only to self-directed, over-the-counter use. Doctors can prescribe ibuprofen at significantly higher doses for conditions like rheumatoid arthritis or osteoarthritis, sometimes up to 3,200 mg per day divided into three or four doses. These higher doses come with closer medical monitoring for the side effects described above. If your OTC dose isn’t managing your pain, a provider may adjust the dose upward or recommend a different approach entirely.