Check your insulin before you use it. Insulin that has not been stored correctly may change in appearance. If your insulin does not look right, it may not work as it should.
You will find information about how to store your insulin safely later in this blog.

Rapid-acting insulin analogue and short-acting insulin (Soluble).

Rapid-acting insulin analogue and short acting soluble insulin from Novo Nordisk should be clear like water. If it looks cloudy or brownish, do not use it.

Longer-acting insulin and pre-mixed insulin.

(NPH, mixtures of NPH and soluble, Lente and Ultralente)

These insulins should all look cloudy after gentle shaking or rolling of the bottle or cartridge. 

Why And How To Check Your Insulin?
Why And How To Check Your Insulin?

Do not use a bottle or cartridge of insulin if:

  • it contains clumps.
  • some of the insulin stays at the bottom of the bottle or cartridge after you have shaken it.
  • it looks brownish. the bottle or cartridge has a frosted appearance from insulin sticking to the glass.