Adults can take Advil (ibuprofen) up to three times a day at the standard over-the-counter dose of 200 to 400 mg per dose, with at least four to six hours between doses. The OTC ceiling is 1,200 mg in 24 hours, which works out to three doses of 400 mg or six individual 200 mg tablets.
Standard OTC Dosing for Adults
Each Advil tablet contains 200 mg of ibuprofen. For general pain relief, the recommended dose is one to two tablets (200 to 400 mg) every four to six hours as needed. Most people settle into a pattern of three doses spaced throughout the day, and that’s the safest approach without a doctor’s guidance.
For menstrual cramps specifically, 400 mg every four hours is considered appropriate, which can mean a slightly higher daily intake. But in all OTC scenarios, staying at or below 1,200 mg per day is the standard safety threshold.
Prescription Doses Are Higher
Doctors sometimes prescribe ibuprofen at much higher amounts for conditions like rheumatoid arthritis or osteoarthritis. In those cases, the daily dose can range from 1,200 mg up to 3,200 mg, divided into three or four doses throughout the day. That upper limit is more than double the OTC recommendation and requires medical supervision, blood work, and monitoring for side effects. If your pain isn’t controlled at OTC doses, that’s a conversation to have with your doctor rather than a reason to take more on your own.
How Long You Can Keep Taking It
Frequency per day is only part of the equation. You shouldn’t take Advil for more than 10 consecutive days for pain or more than 3 consecutive days for fever. Beyond those windows, the risk of stomach and kidney problems rises significantly. If your pain or fever persists past those limits, something else may be going on that needs attention.
Children’s Dosing Works Differently
For kids, the dose is based on weight, not a fixed number of tablets. Children’s ibuprofen can be given every six to eight hours as needed, which means a maximum of three to four doses per day. Ibuprofen should not be given to infants younger than 6 months old. If you don’t know your child’s weight, use age as a rough guide, but weight is always more accurate. The children’s formulations (liquid, chewable tablets) come in lower concentrations, so always check the label for the correct amount.
Why Your Stomach and Kidneys Care
Ibuprofen works by blocking enzymes that produce inflammation, but those same enzymes also help maintain the protective lining of your stomach and regulate blood flow to your kidneys. When you suppress them, you reduce pain and swelling, but you also weaken the stomach’s defenses against its own acid. Over time or at higher doses, this can lead to erosions and ulcers, sometimes without obvious warning signs beforehand.
Your kidneys rely on those same pathways to maintain proper blood flow. Taking too much ibuprofen, or taking it while dehydrated, can reduce the blood supply to your kidneys and impair their ability to filter waste. This is why staying within dose limits matters even when the pain is severe.
To reduce stomach irritation, take Advil at the end of a full meal or with an antacid. Don’t take it on an empty stomach if you can avoid it.
Who Should Take Less or Avoid It Entirely
Several conditions lower your safe threshold or rule out ibuprofen altogether:
- Heart failure or high blood pressure: Ibuprofen can cause fluid retention and worsen both conditions. People with severe heart failure should generally avoid it.
- History of stomach ulcers or GI bleeding: The risk of a new bleed is more than 10 times higher in people with a prior history compared to those without one.
- Aspirin-sensitive asthma: People who have had asthma attacks, hives, or allergic reactions after taking aspirin should not take ibuprofen. Cross-reactivity between aspirin and ibuprofen is well documented, and severe allergic reactions can be fatal.
- Blood thinners, corticosteroids, or SSRIs: All of these increase bleeding risk when combined with ibuprofen. The same goes for regular alcohol use or smoking.
- Recent heart bypass surgery: Ibuprofen is completely off the table in this situation.
Older adults and people with liver disease also face elevated risks and should use the lowest effective dose for the shortest possible time.
Signs You’ve Taken Too Much
An ibuprofen overdose can affect multiple body systems. Symptoms to watch for include severe stomach pain, nausea or vomiting, ringing in the ears, blurred vision, confusion, difficulty breathing, and little to no urine output. In serious cases, seizures or loss of consciousness can occur. If you suspect an overdose, call 911 or the Poison Help hotline at 1-800-222-1222.
Practical Spacing Tips
The simplest approach for most adults: take one or two Advil tablets with food, set a timer for six hours, and reassess whether you need another dose. Not every dose window needs to be filled. If your pain has eased, skip the next one. Using the lowest dose that controls your symptoms, for the fewest days necessary, is the strategy that keeps side effects minimal while still giving you relief.