I'm a type 2 diabetic. The medecine I take affects my blood sugar. The "medecine" that protects me from my medecine is sugar and can be bought anywhere. It's medicinal to me regardless of what any moron TSA agent might think. If my flight is delayed and I can't eat or drink something sugary when I need it, my blood sugar drops and I go into a coma and risk brain damage. Should I depend on the flight attendant to rush me some sugar if I'm about to pass out or should I be allowed to carry it with me? I don't have to rely on sugary drinks in emergencies, I can use sugar pills but his needs are more constant and immediate. I may not agree with this adversarial approach but I sure as hell understand his position.