https://www.uofmhealth.org/conditions-treatments/brain-neurological-conditions/concussion-treatment-and-recovery
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During the first 24 hours you should avoid medications that can increase risk of bleeding. These include aspirin, ibuprofen (Advil), and naproxen sodium (Naprosyn, Aleve). During the first 24 hours acetaminophen (Tylenol) can be used for pain relief.
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