For most adults with a headache, 200 mg to 400 mg of Advil (ibuprofen) is the recommended starting dose. That’s one to two standard tablets, since each over-the-counter Advil tablet contains 200 mg. You can repeat the dose every four to six hours as needed.
How Many Tablets to Take
For a mild headache, one 200 mg tablet is often enough. For more intense pain, two tablets (400 mg) tends to work better. A review of 12 studies on tension-type headaches found that people were more likely to be completely pain-free after taking 400 mg compared to 200 mg. Similar results show up for migraines: about 25% of people were pain-free two hours after a 400 mg dose, and roughly 56% saw their pain drop to a mild level.
The key timing rule: wait at least four to six hours before taking another dose. Most people find that one or two doses handles a typical headache without needing to redose throughout the day.
When It Kicks In
Advil typically starts relieving pain within 30 to 60 minutes of swallowing a tablet. Taking it with a small amount of food can help prevent stomach irritation, though it may slightly delay how quickly you feel relief. If your headache hasn’t improved at all after an hour, don’t double up. Wait the full four to six hours before taking another dose.
Daily Limits for Over-the-Counter Use
The over-the-counter label on Advil caps the dose at 1,200 mg per day for adults, which is three doses of 400 mg (or six individual 200 mg tablets) spread across 24 hours. Prescription doses can go higher under medical supervision, but for self-treating a headache, staying within that 1,200 mg ceiling is the safe range.
If you find yourself reaching for Advil more than twice a week for headaches, that frequency itself becomes a problem. Using painkillers more than 14 to 15 days per month can trigger medication overuse headaches, sometimes called rebound headaches. These feel like the original headache coming back, which leads to taking more medication, which makes the cycle worse. Keeping use under two days per week helps avoid this trap.
Combining Advil With Acetaminophen
Ibuprofen and acetaminophen (Tylenol) work through different mechanisms, and taking them together or alternating them is a common strategy for stubborn headaches. There are even combination products containing both. If you go this route, track each medication separately. The daily ceiling for acetaminophen is 4,000 mg, and many cold medicines, sleep aids, and other products contain hidden acetaminophen, so check labels carefully.
One important note: do not combine Advil with other anti-inflammatory painkillers like naproxen (Aleve) or aspirin. These work through the same pathway and stacking them raises the risk of stomach bleeding without adding much pain relief.
Who Should Be Cautious
Advil is safe for most adults when used occasionally at standard doses, but certain conditions change the math significantly. People with a history of stomach ulcers or gastrointestinal bleeding face a higher risk of those problems recurring. Ibuprofen can also stress the kidneys and raise blood pressure, making it a poor choice for people with kidney disease or uncontrolled high blood pressure.
The FDA requires a warning on all ibuprofen labels about increased risk of heart attack and stroke, particularly at higher doses or with long-term use. This risk is more relevant for people who already have heart disease, a history of stroke, or multiple cardiovascular risk factors like smoking, high cholesterol, or diabetes. Advil should not be taken right before or after heart surgery.
Several common medications also interact with ibuprofen. Blood thinners are the most important, since combining them increases bleeding risk. Certain antidepressants (SSRIs and SNRIs) can also raise that risk. If you take any prescription medication regularly, it’s worth confirming that ibuprofen is safe alongside it.
Alcohol adds another layer. Drinking three or more alcoholic drinks per day while using Advil increases the chance of stomach bleeding.
Signs You’ve Taken Too Much
Ibuprofen overdose is uncommon at normal doses but worth recognizing. Early symptoms include nausea, vomiting, stomach pain, and ringing in the ears. More serious signs include blurred vision, confusion, difficulty breathing, very little urine output, or extreme drowsiness. If you or someone else has taken significantly more than the recommended amount, contact Poison Control at 1-800-222-1222 or call 911.
For Children and Teens
Children 12 and older can follow adult dosing guidelines. For children between 6 months and 11 years old, the dose is based on weight, not age, though age-based charts exist as a backup. Children under 6 months should not take ibuprofen. Pediatric doses can be repeated every six to eight hours, which is a slightly longer gap than for adults. Children’s Advil products come in liquid form with a measuring syringe to help get the dose right.