Compared to yesteryear when the only easy way was taping extra signage etc on the vials of insulin and use of an alarm clock in the house to help one remember when and what insulin was required, one would think that with all the modern tech available now that diabetes societies, insulin manufacturers, drug and device regulators etc would have worked out more reliable safegaurds for all insulins and pens etc. to prevent or minimise this trouble.
I am waiting for insulin vials, and pens to have a gadget attached which says: " you have taken some insulin out ( or injected this insulin) just 40 minutes ago.
Please check what you are doing".
A dalek-like voice might get more attention than others!