@susyt, Thanks for the heads up! I live in Florida but spend the summer in Michigan. We will be flying south next month. I am taking half a dose of Tymlos, and I will have 4 Tymlos pens with partial doses when we leave. I was wondering if I could take them all through security. I bought 2 containers with gel packs that can hold 2 pens each. Does anyone know if I would have a problem taking these through? Do I need a prescription or note from my Dr? Would my box of needles be safe in checked baggage?