How long does Advil (ibuprofen) last?
Advil (ibuprofen) usually starts working within about 30 minutes and lasts roughly 4 to 6 hours for pain and fever, which is why doses are commonly taken every 6 to 8 hours depending on the product directions.
What does “how many hours” mean for dosing?
For many over-the-counter Advil products, the typical adult dosing interval is every 6 hours, but some labels allow every 4 to 8 hours depending on the strength and whether it’s for pain or fever. Check your specific bottle/strength for the exact interval.
Does it last longer for some people or with certain symptoms?
Effects can vary based on the dose, whether you take it with food, your age, and how severe the pain/fever is. Taking it with food can slow absorption, which may delay when you feel relief, even if the medicine still lasts several hours.
When should you get help instead of re-dosing?
If fever lasts more than 3 days, pain lasts more than 10 days (or sooner for severe pain), or symptoms worsen, you should follow up with a clinician rather than keep re-dosing.
Which exact Advil strength do you have?
Different forms (liquid, tablets, “IB,” extended-release, etc.) and strengths can change timing. If you tell me the exact product (mg and whether it says regular vs. extended-release), I can translate that into the expected “hours” for your specific Advil.