How quickly does Advil start relieving headache pain?
Advil (ibuprofen) typically begins easing headache pain within 20 to 30 minutes after taking a standard 200-400 mg dose on an empty stomach.[1][2] Full effects peak around 1 to 2 hours and last 4 to 6 hours.[3]
What affects how fast it works?
Taking it with food delays onset by 30-60 minutes, as absorption slows in the stomach.[1][4] Empty stomach use speeds relief but may increase stomach upset risk. Liquids like Advil Liqui-Gels dissolve faster than tablets, often working in 15-25 minutes.[2]
How does it compare to acetaminophen like Tylenol for headaches?
Ibuprofen targets inflammation better for tension or migraine headaches, starting similarly at 20-30 minutes but providing longer relief (up to 6 hours vs. Tylenol's 4 hours).[3][5] Alternating or combining them can help persistent pain but risks overdose.
When should you expect no relief, and what to do?
If no improvement after 1 hour, the dose may be insufficient or the headache non-responsive (e.g., cluster headaches). Increase to 400-600 mg if safe, or switch to caffeine combo products like Excedrin, which act in 15-30 minutes.[4][6] See a doctor for pain lasting over 48 hours or with fever/vision changes.
Dosage guidelines for adults with headaches
Start with 200-400 mg every 4-6 hours, max 1,200 mg/day without doctor advice. Drink a full glass of water.[1][3]
[1]: FDA Label for Advil
[2]: Pfizer Advil Product Info
[3]: Mayo Clinic Ibuprofen Overview
[4]: Drugs.com Ibuprofen Onset
[5]: WebMD Headache Meds Comparison
[6]: American Migraine Foundation Guidelines