Lente insulin

Lente insulin (from Italian lento, "slow"; also called insulin zinc suspension) was an intermediate duration insulin that is no longer used in humans. The onset of lente insulin is one to two hours after the dose is administered, and the peak effect is approximately 8 to 12 hours after administration, with some effects lasting over 24 hours.

Lente insulin products, along with other insulin analogs in the same family, were discontinued by their manufacturers in the mid-2000s, and are no longer permitted to be marketed for use in humans in the US. This was in part because health care providers began to favor more predictable forms of insulin, such as recombinant NPH insulin.