Why can't I get 6 months at once, all in one box?

Why can't I get 6 months at once, all in one box?

Also asked: BUD, beyond use date, multi month shipment, why did I only get 3 vials, why split my order, expiration date Answer: Compounded medication has a "beyond use date," which is the pharmacy's limit on how long that batch stays good after it's made. It's shorter than the expiration date on a mass-manufactured product.

So a 6-month order ships in batches that each stay inside their own valid window. Typical pattern: three months now, the rest later, with no extra charge and nothing for you to re-do. You paid once.