As others have said it is generally straight forward and they are used to diabetes stuff being in hand luggage. Always keep your stuff with you In your hand luggage, not in checked in luggage.
Take twice as much stuff as you would normally need for the period that you are away, and if travelling with someone else, I would split this between our bags. If one is lost I still have the other stuff. You need to carry a letter from your DSN stating that you need to be carrying your diabetes stuff.
Ensure that you have declared your diabetes to your insurance. It is likely to rise a little but that is understandable.