For most adults, the standard dose is one 200mg ibuprofen tablet every four to six hours. If one tablet doesn’t relieve your pain or fever, you can take two tablets (400mg) per dose. The absolute limit for over-the-counter use is six tablets (1,200mg) in 24 hours.
Standard Adult Dosing
Start with one tablet. This is the recommended first dose for adults and children 12 and older. If that single tablet isn’t enough, step up to two tablets for your next dose. Two tablets, or 400mg, is the standard dose used for moderate pain and menstrual cramps.
Wait at least four to six hours between doses. Even if the pain returns sooner, taking your next dose earlier increases your risk of stomach irritation and other side effects without providing much extra benefit. The goal is always to use the lowest dose that works, for the shortest time you need it.
Here’s a quick reference:
- Single dose: 1 to 2 tablets (200mg to 400mg)
- How often: Every 4 to 6 hours as needed
- 24-hour max (OTC): 6 tablets (1,200mg)
Prescription doses for conditions like rheumatoid arthritis can go significantly higher, up to 3,200mg per day, but that’s under medical supervision with regular blood work and monitoring. Don’t exceed 1,200mg on your own.
Take It With Food
Swallow your tablets whole with a full glass of water, ideally with or right after a meal. Ibuprofen can irritate the lining of your stomach and intestines, and food acts as a buffer. This is especially important if you’re taking two tablets per dose or using it for several days in a row. Taking it on an empty stomach increases the chance of nausea, heartburn, and stomach pain.
Dosing for Children and Teens
Children under 12 should not use 200mg tablets without guidance from a pediatrician, since their dose is based on body weight rather than a flat tablet count. Ibuprofen is not considered safe for infants under 6 months old. For children 6 months and older, liquid formulations with a weight-based dosing chart are the standard approach, given every six to eight hours rather than the four-to-six-hour interval used for adults.
Who Should Avoid Ibuprofen
Ibuprofen belongs to a class of pain relievers that can cause ulcers, bleeding, or even holes in the stomach or intestinal lining, particularly with long-term use. If you have a history of stomach ulcers or gastrointestinal bleeding, it’s a poor choice.
People with heart disease, a recent heart attack, or a history of stroke face additional cardiovascular risks. The same applies if you have high blood pressure, high cholesterol, or diabetes, all of which raise your baseline heart risk. If you have kidney disease, liver disease, heart failure, or asthma (especially with nasal polyps), ibuprofen can worsen those conditions. Adults 75 and older should be particularly cautious, as the risk of stomach bleeding and kidney problems climbs with age.
Pregnancy adds another layer of concern. The FDA warns against using ibuprofen at 20 weeks of pregnancy or later because it can cause kidney problems in the developing baby and reduce amniotic fluid levels. After 30 weeks, the risks increase further, including premature closure of a blood vessel in the baby’s heart that needs to stay open until birth.
Medication Interactions to Watch For
Ibuprofen doesn’t mix well with blood thinners, aspirin, or other anti-inflammatory pain relievers like naproxen. Taking two drugs from the same class doesn’t double the benefit; it multiplies the risk of bleeding. Common antidepressants, including SSRIs like sertraline and fluoxetine, also increase bleeding risk when combined with ibuprofen. If you take oral steroids like prednisone, the combination raises your odds of stomach ulcers significantly.
Signs You’ve Taken Too Much
Ibuprofen overdose symptoms can range from mild to serious. Early warning signs include stomach pain, nausea, vomiting, and heartburn. More concerning symptoms include ringing in the ears, blurred vision, severe headache, confusion, and difficulty breathing. In serious cases, overdose can lead to seizures, very low blood pressure, little or no urine output, and loss of consciousness.
If you or someone else has taken significantly more than the recommended dose and is showing any of these symptoms, call Poison Control at 1-800-222-1222 or your local emergency number. Even if symptoms seem mild, large overdoses can cause kidney damage that isn’t immediately obvious.