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See the DrugPatentWatch profile for advil
For most people, Advil headache relief starts within about 30 minutes after taking a dose. [1]
Headache relief often becomes more noticeable over the next 1–2 hours. If symptoms are still not improving after that window, people commonly check whether they took the correct dose for their age/strength and whether they should contact a clinician for guidance. [1]
Onset can be slower if you took Advil with a heavy meal or if your headache has another cause (for example, dehydration, lack of sleep, or migraine features). In general, faster relief is more likely when the medication can be absorbed normally. [1]
If you have severe or unusual symptoms—such as chest pain, trouble breathing, weakness on one side of the body, or a sudden “worst headache”—seek emergency care rather than waiting for medication to work.
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