Out of curiosity to see if it would make any difference, I recently requested a prescription for Humalog from the FNP-C who treats me at the local (Syracuse) VA. The relatively new (to me) prescription includes the additional caveat below.
*DISCARD OPEN VIAL AFTER 28 DAYS*
This warning was not on my previous Novolog (insulin apart) prescriptions. Huh?
Maybe this is just some new bureacratic boilerplate that is now added to any insulin prescription. But I decided I would ask if anyone knows of a reason insulin lispro might be considered relatively less stable than insulin aspart.
Frankly it makes no sense to me that anything about popping the plastic protective cap off a vial of insulin would make a drastic difference in how quickly the insulin could degrade. I would think other factors such as the temperature the insulin is stored at or exposure to light would be more important than removing the vial’s cover.
It usually takes me around 25 days or less to empty a vial of insulin. So this warning won’t change anything about the way I use insulin. The warning just strikes me as, well, excessive?