Old Insulin

They say you can only keep the Novolog and Lantus pens a month.

We meticulously write dates on each pen as Riley goes through them. We regularly throw away 15-20 units because the four weeks is over but the insulin isn't. But last week, we just kept using the Lantus before bed time even though it was a week past due. His morning blood glucose number was a little low 86. I knew "they" were just trying to get us to buy more insulin, this stuff doesn't really get old. Then lunch rolled around, bg 168. Hmmm, that's odd. Maybe Riley had a pretzel rod in Math class for getting a 100 on your assignment. It is the last class before lunch and Mrs. Math Teacher really does give pretzel rod treats. At dinner, his bg was 172. I'm gonna have to think about that one. Then bedtime again, bg 251. Well, I guess the honeymoon is over...

Next day, we do it all over again. Before breakfast bg 113, lunch 202, dinner 122 and bedtime 234.

Then it hits me! It's the old Lantus.

Proceed with new Lantus.

Before breakfast bg119, lunch 97, dinner 88, bedtime 128.

Why would I think I knew more than "they"?