I've been traveling a lot lately. And during one of my outings, I put my extra humalog pen in the hotel fridge. One would think that I would learn from experience, but in fact I don't. So I woke up one morning and took out a bottle of water and noticed the water was partly frozen. This is not good for insulin.
And I don't know if I mentioned it, but I am also cheap. So despite knowing better, I used the pen for like 4-5 days, getting increasingly frustrated at the uselessness of the insulin and my own stupidity for not throwing the thing away. In the end, I had escalated my dosings to like 5 times my usual dose. And then when I started a new pen, I continued my stupidity by not properly going back to my proper I:C and had a few mild hypos. So in honor of my own boneheadedness, I've decided to write a list indications that my insulin is bad. Hopefully one day, I'll actually pay attention to the list.
10. Your insulin vial/pen has been open so long it has cobwebs on it
9. The expiration date is long past
8. You have so many punctures in the stopper you can see sunlight through it
7. You know you have exposed the insulin to freezing or high temperatures, or left it out in the the sunlight far too long
6. Your insulin is cloudy when it is supposed to be clear
5. Your insulin has clumps even after you rolled it like you are supposed to
4. Your insulin has threads or strings in it
3. Insulin from your suspect vial/pen acts much differently than insulin from another just opened vial/pen
2. Your insulin has changed to an "interesting" color
1. Your blood sugar stays high even after you injected 5 times your normal correction dose
Please feel free to add you stories of bad insulin and "indications."