So I am very organized in storing my insulin pens, insulin vials, CGM supplies, and pods oldest to newest. My prescriptions are written to give me padding for problems that inevitably arise which eat through supplies unnecessarily early.
I like having extra supplies stockpiled, but I think it has caused me some issues in the last few months.
Pods expire 18 months from the date of manufacture. I have personally noticed a much higher failure rate as my stockpile gets older. Pods with 3 months left before expiration have been failing more frequently than newer pods. For 2021, I did not have any pod failures until July. I had 1 or 2 pod failures per month until November, when I had 5 pod failures. Of course it could be a specific Lot of them with issues, but I am really leaning toward the age and expiration date. I have to get my pods through a supplier so thereās no telling how well they are stored at the supplierā¦or how well they are maintained during transport to and from the supplier. After another 2 failures this month, Iāve jumped ahead to pods that donāt expire until next September. Hopefully those will work better.
As far as insulin goes, I cannot tell how far out the expiration date is from the date of manufactureā¦but Iām guessing 2 years based on the expiration dates from the newest insulin fills Iāve just gotten. I inject via pen for my meals and corrections, and I was using a pen that expired that same month. Iāve read that insulin lasts way longer than the expiration date but Iām not convinced of that now. For the last month or two, my injections have been terribly sluggish and ineffective. Probably only 60% efficacy? So I switched to my newest pens and my injections are acting right as rain again. I have also started using my newest vial (the one I was on expires in five months) and it seems more effective, too. My time in range is definitely better.
It bothers me that none of these items were actually past their posted expiration dates. And you never can conclude anything with 100% certainty in T1D, but it seems more likely than not that the fresher, the better with pods, vials and pens. I was ready to pull my hair out with the unresponsiveness of my body to what I was injecting. I hate putting in more and more and more and wondering if it will all finally kick in and tank me. But I am grateful that what I am currently doing is behaving as planned. I like living and eating. Both good things.