To provide stabilized pharmaceutical formulations of insulin analogues and/or insulin derivatives.SOLUTION: An aqueous pharmaceutical formulation comprises: (a). at least one analogue and/or derivative of insulin; (b). Zn(II); (c). sodium chloride; and (d). optionally protamine. The pharmaceutical formulation has a pH value in the range from 6.0 and 9.0 and is free of any additional buffering agent.SELECTED DRAWING: None