I take a lot of medicine and will be gone for 3 weeks. Do I have to have my medicine in the prescription bottle or can I carry it in my weekly containers?

I've packed my medication in weekly container and also in unlabeled containers. They've never said anything about it.

You can check the TSA website. I just traveled a few weeks ago and took all (6 rx) my meds with me in a gallon bag in my carry on.

I carried a week's worth in the weekly divider. No questions. Might want to call TSA on that.