What kind of insulin is NPH?

NPH insulin is used in type 1 and type 2 diabetics to control blood glucose (sugar).

NPH insulin (Humulin N, Novolin N) is an intermediate-acting insulin that usually reaches the bloodstream about 1 to 3 hours after injection, peaks 4 to 12 hours later, and is effective for about 12 to 16 hours.

However, it's important to remember that the onset and duration of action of any insulin may vary individually or at different times in the same individual. NPH insulin is similar to the insulin the body makes naturally.