Insulin 40 vs Insulin 100: Understanding Concentration Differences #3712047 (License: Personal Use)

The image displays two standard insulin vials: one marked “Insulin 40” (U-40), containing 40 units per milliliter, and the other “Insulin 100” (U-100), with 100 units per milliliter. These concentrations are vital for precise dosing-using the wrong syringe or vial can lead to dangerous overdoses or underdoses. U-100 is the most common in human medicine, while U-40 is often used in veterinary settings or specific legacy formulations.

This image is typically used on diabetes education pages, pharmacy resources, or veterinary medicine sites to clarify insulin strength distinctions. It serves users seeking to understand dosage conversion, avoid medication errors, or compare product options-especially caregivers managing insulin-dependent patients or pets.