Table 2: Pharmacokinetics of insulin preparations.

Type of insulin Onset Peak (hours) Duration (hours) Rapid analogs (lispro, aspart, glulisine) 5–15 minutes 1-2 4–6 Short (regular) 30–60 minutes 2-3 6–10 Intermediate (NPH*) 2–4 hours 4–10 12–18 Long (glargine) 2–4 hours Flat 20–24 Long (detemir) 2 hours Flat 6–24

*NPH: Neutral Protamine Hagedorn.