Motrin (ibuprofen) works well for headaches and is one of the most commonly used over-the-counter options for both tension headaches and migraines. At a standard 400 mg dose, about 57% of people with migraines experience meaningful headache relief within two hours, and roughly 40% of people with tension headaches rate their relief as “very good” or “excellent.” It won’t work for everyone, but for most common headache types, it’s an effective first choice.
How Motrin Relieves Headache Pain
When you have a headache, your body produces signaling chemicals called prostaglandins that increase inflammation, widen blood vessels, and make pain-sensing nerves more sensitive to stimulation. Motrin blocks the enzymes responsible for producing these prostaglandins. With fewer of them circulating, swelling decreases, blood vessels return to normal, and your pain threshold rises back up. This is why ibuprofen works on the pain itself rather than just masking it.
How Well It Works for Tension Headaches
Tension headaches, the most common type, respond reasonably well to Motrin. A Cochrane review of clinical trials found that 23% of people taking 400 mg of ibuprofen were completely pain-free at two hours, compared to 16% on placebo. That gap may sound modest, but the picture improves when you look beyond total pain elimination. About 40% of people rated their overall relief as very good or excellent, compared to 23% with placebo. People taking ibuprofen were also significantly less likely to reach for a second pain reliever: only 15% needed rescue medication within six hours, versus 26% of those on placebo.
How Well It Works for Migraines
Motrin is also effective for migraines, though results depend on the dose. At 400 mg, 57% of people had headache relief at two hours, and 35% were completely pain-free. At 200 mg, the numbers were slightly lower but still meaningful, with 52% reporting relief. The 400 mg dose also improved light sensitivity by about 30% and sound sensitivity by nearly 50%, two of the most disruptive migraine symptoms.
For sustained relief over 24 hours, the 400 mg dose performed well too. About 45% of people maintained headache freedom through the full day, compared to 19% on placebo.
How Quickly It Starts Working
You can expect to notice some relief within about an hour, with peak effectiveness around the two-hour mark. Soluble or liquid-gel formulations absorb faster and tend to provide better results at the one-hour point than standard tablets, though by two hours the difference levels out. If speed matters to you, choosing a fast-absorbing version can shave some time off the wait.
Each dose lasts roughly four to six hours. The standard adult dose is 400 mg, which you can repeat every four to six hours as needed.
Motrin vs. Acetaminophen for Headaches
Both ibuprofen and acetaminophen (Tylenol) work for tension headaches, and large-scale analyses show no statistically significant difference in overall effectiveness between the two. That said, the details are interesting. Acetaminophen appears to work slightly faster, showing better pain-free rates at one hour. Ibuprofen pulls ahead at the two-hour mark, suggesting it provides deeper, more sustained relief. People taking acetaminophen were also less likely to need a second dose of medication.
On the safety side, ibuprofen in clinical trials was actually associated with fewer gastrointestinal side effects than acetaminophen in short-term use for headaches. For occasional use, both are reasonable options. If your stomach is sensitive or you take other medications, the choice may come down to which one your body tolerates better.
Avoiding Medication Overuse Headaches
One of the biggest risks with any headache medication, including Motrin, isn’t a side effect in the traditional sense. It’s rebound headaches. When you take NSAIDs like ibuprofen 15 or more days per month, your brain can adapt to the medication and start producing headaches on its own. This creates a cycle where the drug that’s supposed to help becomes part of the problem.
The threshold is clear: keep ibuprofen use for headaches to fewer than 15 days per month. If you find yourself reaching for Motrin that often, the headaches themselves likely need a different management approach rather than more frequent pain relief.
Who Should Be Cautious
Motrin is safe for most adults when used occasionally, but certain conditions change the equation. People who have had a recent heart attack, stomach ulcers, or gastrointestinal bleeding should avoid it. Those with kidney disease, liver disease, heart failure, or uncontrolled high blood pressure need to be careful as well. At low doses (1200 mg per day or less), the cardiovascular risk is minimal based on available evidence, but the risk increases with higher doses and prolonged use.
Ibuprofen can also interact with blood thinners, aspirin, other anti-inflammatory drugs, and common antidepressants (SSRIs and SNRIs), increasing the risk of bleeding. If you’re pregnant, ibuprofen should not be taken at or after 20 weeks.
For children, Motrin is safe from six months of age onward, dosed by weight. It should not be given to infants younger than six months.
Adults 75 and older face higher risks of stomach bleeding and kidney problems with NSAIDs and may be better served by alternatives. Among the traditional anti-inflammatory drugs, low-dose ibuprofen carries the lowest gastrointestinal risk profile, which is one reason it remains a go-to recommendation for occasional headache relief.