For adults, the standard over-the-counter dose of Motrin is two tablets (400 mg total) every four to six hours as needed for pain. That means you can take it up to six times in a 24-hour period if spacing doses four hours apart, though most people need it far less frequently. Each dose lasts roughly four to six hours, so timing your next dose around when pain returns is a practical approach.
Dosing Schedule for 200 mg Tablets
Each Motrin 200 mg tablet is designed to be taken in pairs. The effective adult dose is 400 mg (two tablets) at a time, repeated every four to six hours. If your pain is mild, one tablet (200 mg) may be enough, but the standard recommendation for reliable relief is 400 mg per dose.
The key rule is the gap between doses: never less than four hours. If you took two tablets at 8 a.m. and still feel comfortable at 12 p.m., skip the next dose. Only take it when you actually need it. Over-the-counter ibuprofen should not be used for more than 10 consecutive days for pain, or more than three consecutive days for fever.
Maximum Daily Limit
For self-treating adults buying Motrin off the shelf, the ceiling is 1,200 mg per day, which works out to six tablets. A doctor can prescribe higher daily amounts for specific conditions, but staying at or below 1,200 mg is the safe boundary for over-the-counter use. Going above that threshold significantly increases the risk of stomach irritation, with studies showing a two- to three-fold jump in gastric problems at higher doses.
How Quickly It Works and How Long It Lasts
You can expect pain relief to begin within 30 to 60 minutes of swallowing a dose. The effects then last four to six hours before gradually fading. This timeline is why the four-to-six-hour dosing window exists: it keeps a consistent level of relief without overlap that could push you toward taking too much.
One common belief is that you need to take ibuprofen with food to protect your stomach. At standard OTC doses (1,200 mg or less per day for up to a week), there is no strong scientific evidence that food prevents stomach irritation. Taking it on an empty stomach actually provides faster relief because food slows absorption. That said, if you personally notice stomach discomfort, eating something beforehand is a reasonable precaution.
Dosing for Children
Children follow a different schedule. Ibuprofen can be given every six to eight hours (not every four hours, as with adults), and the dose is based on the child’s weight rather than age. Ibuprofen should not be given to infants younger than six months. For older children, liquid formulations or chewable tablets with a dosing chart on the package are easier to measure accurately than splitting adult 200 mg tablets.
Who Should Be Cautious
Ibuprofen is not a good fit for everyone, even at low OTC doses. People who have had a recent heart attack, those with heart failure, and anyone with significant kidney or liver disease face elevated risks. If you have a history of stomach ulcers or GI bleeding, the FDA’s label warns that your chance of stomach bleeding is higher. The same applies if you’re over 60, drink three or more alcoholic beverages daily, or take a blood thinner or steroid.
Pregnancy adds another layer of concern. Ibuprofen should be avoided after 20 weeks of pregnancy because it can cause complications for the developing baby and during delivery.
Long-term, continuous use at any dose carries a small but real increase in the risk of heart attack or stroke. This is a class-wide effect for all NSAIDs, not unique to Motrin.
Interactions With Other Medications
If you take a blood thinner like warfarin or apixaban, adding ibuprofen raises your bleeding risk substantially. One large clinical trial found that people on oral anticoagulants who also used NSAIDs had roughly 60 to 70 percent higher rates of significant bleeding compared to those who avoided NSAIDs. Aspirin, even low-dose aspirin for heart protection, also interacts poorly because both drugs affect how blood clots and how the stomach lining protects itself. Blood pressure medications can become less effective when combined with regular ibuprofen use.
Signs You’ve Taken Too Much
Ibuprofen overdose is uncommon at recommended doses, but it’s worth knowing the warning signs in case of an accidental double dose or a child getting into the bottle. Early symptoms include severe stomach pain, nausea, vomiting, and heartburn. More serious signs are ringing in the ears, blurred vision, confusion, difficulty breathing, and producing very little urine. Seizures and loss of consciousness can occur in extreme cases. If you suspect an overdose, contact poison control or seek emergency care immediately.
Quick Reference
- Adult dose: 200 to 400 mg (one to two tablets) per dose
- Frequency: Every 4 to 6 hours as needed
- Daily max (OTC): 1,200 mg (six tablets)
- Max days for pain: 10 consecutive days
- Max days for fever: 3 consecutive days
- Onset: 30 to 60 minutes
- Duration: 4 to 6 hours per dose