For adults, you can take 1 to 2 regular-strength Motrin tablets (200 mg each) at a time, for a single dose of 200 to 400 mg. You can repeat that dose every 4 to 6 hours as needed, but you should not exceed 3 tablets (600 mg) in a single dose or 1,200 mg total in 24 hours when using the over-the-counter version without medical guidance.
Standard Adult Dose
Each regular Motrin or ibuprofen tablet sold over the counter contains 200 mg. The recommended single dose for mild to moderate pain is 200 to 400 mg, which means 1 or 2 tablets. You can take another dose every 4 to 6 hours, with a ceiling of 1,200 mg (6 tablets) in a 24-hour period for self-directed OTC use.
Prescription-strength ibuprofen goes higher. Doctors sometimes prescribe 600 mg or 800 mg doses for conditions like rheumatoid arthritis, with daily totals reaching up to 3,200 mg. But those doses are monitored by a provider for a reason: the risk of stomach, kidney, and heart side effects climbs with the amount you take.
Higher Doses Don’t Work Better for Pain
If you’re tempted to take more tablets hoping for faster or stronger relief, the evidence is surprisingly clear. A study of 225 emergency department patients compared single doses of 400 mg, 600 mg, and 800 mg of ibuprofen for acute pain. After 60 minutes, all three groups reported nearly identical pain scores, dropping to between 4.36 and 4.50 on a 10-point scale. Separate research has shown even 200 mg and 400 mg produce equivalent relief for many types of pain.
In other words, taking 4 tablets instead of 2 doesn’t double the benefit. It just increases the chance of side effects. For most acute pain and menstrual cramps, 400 mg (2 tablets) is the sweet spot.
Protecting Your Stomach
Ibuprofen works by blocking enzymes involved in inflammation, but those same enzymes also help maintain the protective lining of your stomach. That’s why the most common side effect is GI irritation: heartburn, nausea, and in more serious cases, stomach bleeding or ulcers.
Taking Motrin at the end of a full meal or with an antacid helps reduce that irritation. Swallowing it on an empty stomach, especially at higher doses or over multiple days, raises the risk considerably. If you find yourself reaching for ibuprofen regularly for more than 10 days, that pattern itself is worth discussing with a doctor.
Who Should Take Less or Avoid It
Certain health conditions change the math on ibuprofen safety entirely. People with chronic kidney disease face a real risk of further kidney damage, including acute kidney injury and progressive loss of kidney function. Those with heart failure or high blood pressure can see both conditions worsen, because ibuprofen promotes water and salt retention.
If you take low-dose aspirin (81 mg daily) for heart protection, ibuprofen can interfere with aspirin’s ability to prevent blood clots. The FDA has specifically warned that taking both together may reduce aspirin’s cardiovascular benefit. If you need both, timing matters, and that’s a conversation to have with your pharmacist or doctor.
People with a history of stomach ulcers, liver cirrhosis, or those who take blood thinners should be especially cautious. For these groups, even standard OTC doses carry elevated risk.
Dosing for Children
Children’s Motrin is dosed by weight, not age, and comes in lower concentrations than adult tablets. Ibuprofen should not be given to infants under 6 months old. For older children, you can give a dose every 6 to 8 hours as needed, but the amount depends on the child’s weight. The packaging includes a dosing chart, and staying within those guidelines matters more than it does for adults because children are far more sensitive to overdose.
Signs You’ve Taken Too Much
Ibuprofen overdose symptoms can affect multiple systems. Stomach pain, nausea, vomiting, and diarrhea are the earliest and most common signs. More serious toxicity can cause ringing in the ears, blurred vision, severe headache, confusion, difficulty breathing, and very little urine output. In extreme cases, seizures and loss of consciousness can occur.
If you or someone else has taken significantly more than the recommended amount, call Poison Control at 1-800-222-1222 or 911. Don’t wait for symptoms to appear, because kidney and stomach damage can develop before obvious warning signs show up.
Quick Reference
- Single OTC dose: 1 to 2 tablets (200 to 400 mg)
- How often: Every 4 to 6 hours as needed
- OTC daily max: 1,200 mg (6 tablets) in 24 hours
- Prescription daily max: Up to 3,200 mg, under medical supervision
- Best practice: Take with food, use the lowest effective dose, and keep use as short as possible