Insuvet should be stored at 2°C - 8°C. Do not freeze. Insuvet Lente and Insuvet Protamine Zinc vials should be shaken gently by inversion several times before the dose is withdrawn. The vial must not be used if the contents do not re-disperse. Following withdrawal of the first dose, use the product within 28 days. Discard unused material. Unused product and associated waste should be disposed of in a accordance with any guidance from an appropriate waste regulation authority.