How fast does Advil (ibuprofen) usually work for a headache?
For most people, Advil starts to ease headache pain within about 30 to 60 minutes after taking a dose. Pain relief tends to be strongest a couple of hours after the dose, with effects lasting several hours depending on the cause of the headache and the dose taken.
How long until the headache is fully gone?
A typical pattern is partial relief within the first hour, with either substantial improvement or near-resolution within a few hours. If the headache hasn’t improved meaningfully after a couple of hours, that can be a sign the dose/timing isn’t enough for that headache type, or that a different approach may be needed.
What’s considered “not working”?
If you’ve taken Advil as directed and you get little or no improvement after about 2 hours, you may need to avoid stacking more doses too quickly and instead consider alternative options (such as waiting for the next dosing window or using a different medication approach, if appropriate for you).
When should you get medical help for a headache?
Seek urgent care right away if you have “worst headache of your life,” sudden severe headache, headache with weakness/numbness, confusion, fainting, seizure, trouble speaking, fever with stiff neck, or vision loss. Also get prompt medical advice if headaches are new for you, are getting rapidly worse, or you need pain relievers repeatedly (for example, many days per month), since that can lead to medication-overuse headaches.
What can change how quickly Advil works?
Speed of relief can vary with factors like whether you took it with food (on a full stomach, onset may be slower), hydration, the specific headache type (tension vs. migraine), and how quickly you take it after symptoms start.