Yes, you can take ibuprofen (Advil, Motrin) in your carry-on luggage without any issues. The TSA and other international security agencies allow solid medications in pill or tablet form in unlimited quantities in carry-on bags. You are not required to keep them in their original packaging, though doing so can help avoid delays if a security officer decides to perform a manual bag check. If you prefer liquid ibuprofen (common for children), it is exempt from the standard 3-1-1 liquids rule because it is considered a medically necessary liquid. You are allowed to bring more than 3.4 ounces (100ml) of liquid medication, but you must declare it to the TSA officer at the beginning of the screening process so they can inspect it separately. For international travel, ibuprofen is legal in almost every country, but it is always wise to keep a copy of your prescription if you are carrying unusually large quantities of any medication.