We are taking our 3 year old with us for the first time this weekend to CUN. She is on a twice daily liquid medication that must stay refrigerated. I have a small ziplock I put it in with 2 ice packs. I would prefer not to check and carry on just in case bags get separated (she can't) miss a dose.

Does anyone know if this will be a problem?

It is in the orginal bottle with official US RX label.

I can't locate MX rules concerning liquids in carry ons.

Please direct me to an OFFICIAL link.