Oh that is an easy one...Humulin N is a short acting insulin in which is hits hard dropping the blood sugar fast but in cats wears off in about 4-6 hours since cats metabolize insulin twice as fast as either humans or dogs. When it wears off the blood sugar rises right back up because there is no insulin on board for another 6-8 hours to help the body control the blood sugar until you give the next shot.
The three favorites here are Lantus, Levemir or Prozinc both of the Ls are human insulins and what are known as a depot insulin where one shot builds on the next one causing an overlap so that kitty has insulin on board all the time while both the Ls can last up to 24 hours in a human it does last 12 hours in a cat, they are also a more gentle insulin in that they bring the blood sugars down more slowly but hold them longer...Prozinc is a pet only insulin but it also is a long lasting insulin, but is what is known as an in and out insulin...in that by the time the next shot time rolls around it is wearing off. Any of the 3 are a better choice than Humulin N
Mel, Maxwell, Autumn & The Fur Gang
