Is This My Responsibility? If So, I'm Doing A Terrible Job

Beth ran out of one of her medications so we went to the store tonight to get it refilled and the pharmacist told me that she has to see the doctor before we can get more.

Okay, but she was just there last week for a complete physical. They confirmed which medications she was taking and the dosages. Shouldn't they have noticed that her meds were about to run out? Or is that my responsibility? Am I supposed to check her medication bottle to see how many months they allow, then make sure I schedule an appointment before it runs out?

Is that my job, or theirs? Either way, I'll be calling the doctor tomorrow.