How long does headache relief from one advil (ibuprofen) 200mg last?

That depends: Depending on what is causing your headache, the Advil (ibuprofen) 200 mg may take it way for good, or it may return n 4-6 hours, etc. Hopefully, it is the former for you. Best wishes.

Each person differen: the usual time is 4 to 6 hours Some people with just one advil (ibuprofen) have relief for days Some just have relief for 2 to 3 hours but most of the time the medication lasts 4 hours If continued headaches go to your provider for more help and prevention methods