For a standard headache, the recommended adult dose of Advil (ibuprofen) is 200 to 400 milligrams, taken every four to six hours as needed. That means one or two standard Advil tablets, since each tablet contains 200 mg. Most adults find that 400 mg provides reliable relief for a tension headache, and you should not exceed 1,200 mg (six tablets) in a 24-hour period when self-treating without a doctor’s guidance.
Standard Adult Dose
Each regular-strength Advil tablet or liquid gel contains 200 mg of ibuprofen. For mild to moderate headache pain, 400 mg (two tablets) is the standard single dose recommended by the Mayo Clinic. You can repeat that dose every four to six hours if the headache returns, but most people find that a single dose handles an ordinary tension headache without needing to redose.
If your headache is mild, starting with just one tablet (200 mg) is reasonable. You can always take a second tablet if you don’t feel relief after 30 to 60 minutes. This approach gives you effective pain relief while keeping your total daily intake lower.
How Quickly It Works
Ibuprofen typically starts easing headache pain within 20 to 30 minutes of swallowing it. Peak relief arrives between one and two hours after the dose. Taking it with a small amount of food or a full glass of water can help it absorb more smoothly and reduce the chance of stomach irritation, though taking it on an empty stomach won’t make it work dramatically faster.
If you’re still in significant pain two hours after your dose, that’s a reasonable point to consider whether a second dose is appropriate, as long as at least four hours have passed since the first one.
How It Relieves Headache Pain
Ibuprofen works by blocking an enzyme your body uses to produce compounds called prostaglandins. Prostaglandins are chemical messengers that amplify pain signals and drive inflammation. By lowering prostaglandin levels, ibuprofen turns down the volume on the pain signaling that creates that dull, pressing headache sensation. This is also why it reduces fever and swelling at the same time.
Dosing for Children
Children’s Advil products come in lower-concentration liquid forms designed for smaller bodies. The correct dose is based on your child’s weight first, and age second. If you know your child’s weight, use that number rather than age to pick the right amount from the dosing chart on the package.
Ibuprofen should not be given to infants under six months old unless specifically directed by a pediatrician, as it has not been established as safe in that age group. For children six months and older, doses can be repeated every six to eight hours (a wider interval than for adults). The children’s dosing chart on the product packaging walks you through exact milliliter amounts by weight range.
When to Space Out Your Doses
The minimum gap between adult doses is four hours, but six hours is a safer default rhythm if your headache is manageable between doses. Stacking doses too close together raises the risk of stomach irritation without meaningfully improving pain relief. If you find yourself reaching for ibuprofen more than two or three days in a row for headaches, that pattern itself is worth paying attention to. Frequent use of any pain reliever can actually cause “rebound” headaches, where the medication withdrawal triggers a new cycle of head pain.
People Who Should Be Careful
Ibuprofen is generally well tolerated for occasional use, but certain conditions make it riskier. People with a history of stomach ulcers or gastrointestinal bleeding are more vulnerable to irritation from ibuprofen, since the same prostaglandins it blocks also help protect the stomach lining.
Kidney function is another concern. If you’re dehydrated from vomiting, diarrhea, or simply not drinking enough fluids, ibuprofen can reduce blood flow to the kidneys and increase the risk of acute kidney injury. People with heart failure, liver cirrhosis, or diabetes also face higher odds of kidney-related side effects. Older adults fall into this higher-risk category as well, since kidney function naturally declines with age.
If you take low-dose aspirin daily for heart protection, timing matters. Ibuprofen can interfere with aspirin’s ability to prevent blood clots if the two are taken at the same time. The FDA recommends spacing them apart, ideally taking aspirin at least 30 minutes before or eight hours after ibuprofen, so aspirin’s cardiovascular benefit isn’t blunted.
Tips for Getting the Most From Your Dose
Taking ibuprofen early in a headache, before the pain fully ramps up, tends to produce better results than waiting until the headache is severe. Once prostaglandin levels are already elevated and pain signals are firing at full intensity, it takes longer for the medication to catch up.
Drink a full glass of water with your dose. Dehydration is one of the most common headache triggers, so the water itself may help. Pairing ibuprofen with a small snack reduces the chance of nausea or stomach discomfort, especially if you’re sensitive to medications on an empty stomach.
If 400 mg of ibuprofen doesn’t touch your headache after two hours, or if you’re experiencing headaches frequently enough that you’re taking it multiple times a week, that’s a signal to look at the underlying cause rather than increasing the dose.