It is better but costs more at $72 per vial. Regular/R insulin: >Regular Human Insulin which has an onset of action of 1/2 hour to 1 hour, peak effect in 2 to

It is better but costs more at $72 per vial. Regular/R insulin: >Regular Human Insulin which has an onset of action of 1/2 hour to 1 hour, peak effect in 2 to 4 hours, and duration of action of 6 to 8 hours. The insulin they're offering: >starts to work about 15 minutes after injection, peaks in about 1 hour, and keeps working for 2 to 4 hours. For example, if you have maybe 15 grams more of carbohydrates than you planned and you did R (old insulin), then you will either have to wait or, what they did for me in school back at that time, send em to P.E for awhile (since exercise _mostly_ and _usually_ lowers blood sugars) ;-).