Keeping medication cool

Hi,

Any tips on keeping medication cool on a flight and through security? I have thought about buying cold drinks but obviously through security is an issue but ok to buy at other side. My ice tablets I think are too big if considered a liquid which it will become eventually?
Please help.

I didn't find the right solution from the Internet.

References:
www.tripadvisor.in/ShowTopic-g1-i10702-k10503059-Keeping_medication_cool-Air_Travel.html
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Thanks