How should Humalog Mix25 100 units/ml suspension in a vial (insulin lispro) be resuspended before use?

Rotate the Humalog Mix25 100 units/ml suspension vial (insulin lispro) in your palms before use until uniformly cloudy or milky, repeating if necessary; avoid vigorous shaking because frothing may impair dose measurement, and do not use if clumps are present or solid white particles stick to the bottom or wall, giving a frosted appearance.