Is Cloudy Insulin Bad

If regular insulin

Can you use insulin if it's cloudy?

Do not use rapid- or long-acting insulin if it is cloudy or has particles floating in it. Do not use intermediate-acting insulin if particles or lumps are floating around after mixing or solid pieces stick to the bottle.

Why does insulin become cloudy?

They look cloudy because particles of insulin are not fully dissolved. When the insulin bottle or pen sits still for a few minutes, the particles of insulin settle out, and fall to the bottom of the container.