How quickly does Advil relieve headaches?
Advil (ibuprofen) typically starts reducing headache pain within 20 to 30 minutes after taking a standard 200-400 mg dose on an empty stomach. Peak pain relief occurs around 1 to 2 hours, lasting 4 to 6 hours for most people.[1][2]
What affects how fast it works?
Absorption speed depends on stomach contents—faster on an empty stomach (15-30 minutes onset) versus with food (up to 1 hour delay). Higher doses (up to 400 mg) or liquids like Advil Migraine may act quicker. Factors like age, metabolism, dehydration, or headache severity can slow it to 45-60 minutes.[1][3]
How does it compare to Tylenol or aspirin for headaches?
Advil often works faster than Tylenol (acetaminophen, 30-60 minutes onset) for inflammatory headaches like tension or migraines, due to its anti-inflammatory action. Aspirin matches it at 20-30 minutes but irritates the stomach more. Combining Advil with caffeine (e.g., in Excedrin) can speed relief by 10-20%.[2][4]
When does it fail to work, and what then?
If no relief in 1 hour, the headache may not respond to NSAIDs—try acetaminophen, a different class like triptans for migraines, or see a doctor for rebound headaches from overuse. Don't exceed 1,200 mg/day without advice; risks rise after 10 days.[1][5]
Are there risks or side effects patients report?
Common: stomach upset (10-20% of users). Rare but serious: ulcers, heart issues with long-term use. Avoid if you have ulcers, kidney problems, or take blood thinners. Pregnant people should skip after 20 weeks.[3][5]
[1]: FDA Label for Advil (ibuprofen), https://www.accessdata.fda.gov/drugsatfdadocs/label/2016/017463s294lbl.pdf
[2]: Pfizer Pharmacokinetics Data, https://labeling.pfizer.com/ShowLabeling.aspx?id=913
[3]: Mayo Clinic Ibuprofen Overview, https://www.mayoclinic.org/drugs-supplements/ibuprofen-oral-route/description/drg-20070602
[4]: American Headache Society Guidelines, https://americanheadachesociety.org/wp-content/uploads/2021/03/AcuteTreatmentGuidelines2021.pdf
[5]: WebMD Ibuprofen Side Effects, https://www.webmd.com/drugs/2/drug-5166-9368/ibuprofen-oral/ibuprofen-oral/details