This page lists insulins with zinc suspensions. [1]

Trade names:

These fall into the category of short-acting insulins.

The following are lente type zinc suspension insulins but since they are produced for use in animals, they are not found in BNF, but in its sister veterinary formulary.

These fall into the category of intermediate-length insulins.

British Pharmacopia [4] defines Ultralente-type insulins as: A sterile neutral (neutral used here refers to the pH, not to the fast-acting insulin known as neutral or R) suspension of bovine insulin or of human insulin in the form of a complex obtained by the addition of a suitable zinc salt; consists of rhombohedral crystals (10-40 microns).

Trade names:

These fall into the category of long-acting insulins.


  1. Dumitriu, Severian (2001). Polymeric Biomaterials, Revised and Expanded 1104. CRC Press.
  2. Iletin I Lente-Beef/Pork Insulin Shown at Right.
  3. Carton Image-Iletin II Lente.
  4. British Pharmacopia-Ultralente Insulin

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