Could someone please help me understand what the U in U100 insulin stands for? On a website I found it states that U100 means that there are 100 units of insulin per mL of liquid. Would that mean that a U40 syringe only has 40 units of insulin per mL and if that is the case how would you know what syringe to use when looking at a Dr.'s prescription?
Any feedback would be greatly appreciated. =)