Diabetes Medication & Calculation Center

Master Diabetes Medication Safety

Insulin timelines, oral diabetes classes, calculation lab, blood glucose scenarios, NCLEX review, flashcards, and games — built for nursing education.

Compare onset, peak, and duration across insulin classes. Timing drives safety.

Rapid-Acting

Insulin Lispro

Insulin Aspart

Insulin Glulisine

Purpose: Cover mealtime glucose rise

Onset

~15 min

Peak

1 hr

Duration

3–4 hr

Give within 15 min of a meal

Blood glucose before meals and PRN symptoms

Short-Acting (Regular)

Regular Insulin (Humulin R, Novolin R)

Purpose: Mealtime coverage; IV use in acute settings

Onset

30–60 min

Peak

2–3 hr

Duration

5–8 hr

Give 30 min before a meal

Blood glucose pre-meal & 2 hr post-meal trends

Intermediate (NPH)

NPH Insulin (Humulin N, Novolin N)

Purpose: Basal-like coverage between meals & overnight

Onset

1–2 hr

Peak

4–12 hr

Duration

12–18 hr

Timing tied to peak — watch for hypoglycemia around peak

Blood glucose around expected peak hours

Long-Acting (Basal)

Insulin Glargine

Insulin Detemir

Insulin Degludec

Purpose: Steady basal coverage

Onset

1–2 hr

Peak

No pronounced peak

Duration

Up to 24 hr (Degludec >24 hr)

Given once daily at the same time — not meal-tied

Fasting blood glucose trends

Safety Reminder

Diabetes medication content and calculations are for nursing education and practice only. Always verify medication orders, calculations, and protocols according to approved clinical resources and workplace policies.