I've travelled extensively with my diabetic daughter (minor) and we carry a complete kit of syringes, insulin, lancets, monitor, etc. on-board wherever we go.
I do make a point of keeping copies of her prescriptions in case of questioning, but we've never had a problem with screening or security.
kmc

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"Aviation is proof that given the will,
we have the capacity to achieve the impossible."
-- Eddie Rickenbacker