Huminsulin 30/70 and Mixtard 30 are both premixed human insulin products with the same 30/70 ratio, containing 30% short acting human insulin and 70% intermediate acting insulin, so they are similar and are sometimes used interchangeably. However, any switch between insulin brands or formulations should be done only under a doctor’s supervision, as even slight differences in formulation, absorption, and individual response can affect blood sugar control, and dose adjustments may be required. Always consult your healthcare provider before substituting one insulin product for another.