Adults can take Motrin (ibuprofen) every 6 to 8 hours as needed, with a maximum of 1,200 mg per day for over-the-counter use. That translates to 200 to 400 mg per dose, up to three times daily. Going beyond this without medical supervision increases the risk of stomach, kidney, and cardiovascular problems.
Standard Dosing for Adults
The standard over-the-counter dose is 200 mg or 400 mg every 6 to 8 hours. Most people do well spacing doses at least 6 hours apart and not exceeding three doses in 24 hours. At this frequency, you stay within the 1,200 mg daily ceiling that applies to self-treated pain and fever.
For chronic conditions like osteoarthritis or rheumatoid arthritis, doctors sometimes prescribe higher amounts, up to 3,200 mg per day split into three or four doses. That level of use requires medical monitoring and isn’t something to do on your own.
Motrin typically takes 30 to 60 minutes to start relieving pain. If you don’t feel relief after an hour, resist the urge to take another dose early. Doubling up compresses the gap between doses and pushes you toward the daily limit faster than intended.
Dosing for Children
Children’s Motrin can be given every 6 to 8 hours as needed, the same interval as for adults. The key difference is that the dose is based on weight, not age, though age can serve as a backup if you don’t have a recent weight. Ibuprofen should not be given to babies under 6 months old unless a pediatrician specifically recommends it.
Children’s formulations come in liquid concentrations that differ from adult tablets, so always use the measuring device included in the package rather than a kitchen spoon.
How Many Days in a Row Is Safe
For general pain or fever, do not take Motrin for more than 10 consecutive days without talking to a doctor. If your symptoms haven’t improved or have worsened within that window, something else may be going on that ibuprofen won’t fix.
People who take ibuprofen daily for weeks or months face a growing list of risks. The kidneys are especially vulnerable. Prolonged use can cause fluid retention, worsen high blood pressure, and in serious cases lead to acute kidney injury. Over time, it can also accelerate the progression of existing kidney disease. The stomach lining takes a hit too: chronic use irritates the digestive tract and can erode it enough to cause ulcers or internal bleeding.
Take It With Food
Motrin is easiest on your stomach when you take it at the end of a full meal or with an antacid. The most common side effects are stomach irritation, heartburn, and acid reflux. In more severe cases, the drug can erode the stomach lining and cause ulcers. Eating beforehand creates a buffer that reduces direct contact between the medication and your stomach wall.
If you regularly experience stomach discomfort even when taking Motrin with food, that’s a signal to reconsider how often you’re using it or to explore alternatives with a provider.
Who Should Avoid Motrin
Pregnant women should not take Motrin at 20 weeks or later. The FDA warns that ibuprofen and other drugs in the same class can cause kidney problems in the developing baby after that point, leading to dangerously low amniotic fluid. After 30 weeks, the risks escalate further: the medication can cause premature closure of a blood vessel near the baby’s heart. If ibuprofen is truly necessary between weeks 20 and 30, the guidance is to use the lowest dose for the shortest time possible.
People taking blood thinners, whether antiplatelet drugs like aspirin or anticoagulants like warfarin, should be cautious. Ibuprofen affects the way platelets work, interfering with normal clotting. Combining it with a blood thinner raises the risk of bleeding, particularly in the digestive tract. This also applies to less obvious products that contain ibuprofen or related ingredients, including Advil PM and some cold medicines. If you take a blood thinner, check the active ingredients on any over-the-counter painkiller before using it.
Signs You’ve Taken Too Much
An ibuprofen overdose can range from uncomfortable to life-threatening depending on the amount. Early warning signs include severe stomach pain, nausea, vomiting, and ringing in the ears. More serious symptoms include blurred vision, confusion, difficulty breathing, very low urine output, and seizures. If someone has taken significantly more than the recommended dose, especially a child, call Poison Control (1-800-222-1222) or seek emergency care immediately. Even in milder cases, low blood pressure, sweating, and unsteadiness can develop.
The risk isn’t limited to a single large overdose. Consistently exceeding the daily limit by even a small margin, day after day, can quietly strain the kidneys and stomach in ways that don’t produce obvious symptoms until real damage has occurred.