What are the brand names of intermediate-acting insulin?

Medical Advisory BoardAll articles are reviewed for accuracy by our Medical Advisory Board
Educational purpose only • Exercise caution as content is pending human review
Article Review Status
Submitted
Under Review
Approved

Last updated: August 1, 2025View editorial policy

Personalize

Help us tailor your experience

Which best describes you? Your choice helps us use language that's most understandable for you.

Brand Names of Intermediate-Acting Insulin

Intermediate-acting insulins include NPH (Neutral Protamine Hagedorn) insulin, also known by brand names Humulin N and Insulatard HM, and Lente insulin. 1

Types of Intermediate-Acting Insulin

Intermediate-acting insulins are characterized by their pharmacokinetic profile that positions them between short-acting and long-acting insulins:

  • NPH insulin (Neutral Protamine Hagedorn)

    • Brand names: Humulin N, Insulatard HM, Novolin N
    • Onset: Approximately 1 hour
    • Peak action: 6-8 hours
    • Duration: Approximately 12 hours 1
  • Lente insulin

    • Brand name: Insulin zinc suspension (Lente)
    • Onset: Approximately 1 hour
    • Peak action: 6-8 hours
    • Duration: Approximately 12 hours 1

Clinical Characteristics of Intermediate-Acting Insulin

Intermediate-acting insulins have distinct pharmacokinetic properties that affect their clinical use:

  • They have a slower onset of action compared to rapid-acting and short-acting insulins
  • They peak several hours after administration (6-8 hours)
  • Their duration of action is approximately 12 hours 1
  • They appear uniformly cloudy upon visual inspection (unlike rapid-acting and short-acting insulins which should be clear) 1

Comparison with Other Insulin Types

Rapid-Acting Insulins

  • Examples: Aspart (NovoLog/NovoRapid), Lispro (Humalog)
  • Onset: 5 minutes
  • Peak: 1-2 hours
  • Duration: 3-4 hours 1

Short-Acting Insulins

  • Example: Regular insulin
  • Onset: 15 minutes
  • Peak: 3-4 hours
  • Duration: 6-8 hours 1

Long-Acting Insulins

  • Examples: Glargine (Lantus), Detemir (Levemir), Degludec (Tresiba)
  • Onset: 1 hour
  • Peak: None or minimal
  • Duration: 24 hours or more 1, 2

Clinical Considerations

When using intermediate-acting insulin:

  • Due to their pronounced peak action, intermediate-acting insulins like NPH carry a higher risk of hypoglycemia compared to long-acting insulin analogs like glargine or detemir 2
  • Patients must eat meals at set intervals to avoid hypoglycemia when using intermediate-acting insulin 1
  • NPH insulin can be mixed with short-acting or rapid-acting insulins in the same syringe for convenience 1
  • Pre-mixed formulations containing fixed ratios of intermediate-acting and short/rapid-acting insulins are available (e.g., 70% NPH/30% regular, 50% NPH/50% regular, 75% NPL/25% insulin lispro) 1

Cost Considerations

Intermediate-acting insulins like NPH may be more affordable options compared to newer long-acting insulin analogs, which is an important consideration for patients with cost constraints 1. According to 2023 pricing data, NPH insulin is generally less expensive than long-acting insulin analogs 1.

References

Guideline

Guideline Directed Topic Overview

Dr.Oracle Medical Advisory Board & Editors, 2025

Guideline

Insulin Glargine (Lantus) Guideline Summary

Praxis Medical Insights: Practical Summaries of Clinical Guidelines, 2025

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

Have a follow-up question?

Our Medical A.I. is used by practicing medical doctors at top research institutions around the world. Ask any follow up question and get world-class guideline-backed answers instantly.