Carolyn, it would be very useful to you to visit the Prozinc forum
HERE and read through the information there. I am not a Prozinc user and cannot advise you but read through the Beginner's guide
http://www.felinediabetes.com/FDMB/...prozinc-pzi-insulin-for-diabetic-cats.164995/
There is information about using the U-100 syringes but you must be careful to correctly use the conversion chart to avoid mis-dosing:
A note on using U-100 syringes with the Conversion Chart: Many people find that using U-100 syringes with half-unit markings makes it easier to fine-tune a dose, in 0.2 unit increments. (
You MUST use the Conversion Chart; the link appears both above and below.) In the United States, the U-100 syringes (designed for use with the more concentrated U-100 insulins)
usually have
ORANGE caps - but again, the cap color
may vary with the manufacturer or where you live in the world.
PLEASE make sure you are using the correct syringes for dosing ProZinc: Either the U-40 or the U-100 (again, the
conversion chart is
required when dosing ProZinc with U-100s.)
Post in the Prozinc forum so that the experienced users can advise you on this issue.