Question: is nph insulin long acting?
Answer: NPH insulin has a longer duration of action than the rapid-acting insulins (Novolog, Apidra, Humalog) and the short-acting insulins (Humulin R, Novolin R). NPH insulin usually has an onset (starts to work) about 1 to 3 hours after injection, peaks 4 to 12 hours later, and is effective for about 12 to 16 hours.