"could have had long reaching consequences"

My husband had to attend Antrim A&E when he suddenly took unwell. On his second day in the ED dept after being woke up @ 1am to tell him they had to move him into a chair for the rest of his stay he reminded them he needed to have his insulin shot as it it was due.

They didn’t have the dosage he usually takes in one insulin pen so they proceeded to try and give it to him in 2 dosages of insulin pen.  Thankfully my husband noticed that both the injections they gave him were both used and empty. The nurse told him she’d no idea how it happened as she had taken them from the fridge! That could have had long reaching consequences without knowing who had used them before he was given them.