Is Novolin N suppose to be cloudy?

Novolin N, or NPH insulin, is cloudy. Regular insulin is clear.

Novolin N (Recombinant Human Insulin) is supposed to be cloudy or milky. Infact you should not use the medication if it does NOT appear to be cloudy or milky.
But in case of white lumpy or solid particles in the sides or white precipitate, better you should not use it.