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Insulins that appear cloudy or milky are actually insulin crystals in a suspension. They do not dissolve until they are injected under the skin, and must be re-suspended (carefully agitated) before each use.

These insulins must never be administered intravenously, and must never be allowed to contaminate clear, soluble insulin vials because they will change the action of the other insulin.


Cloudy Insulins-All Species

NPH/Isophane

Mixed Insulins

semilente

Lente

ultralente

PZI


See also mixing insulin.