Abstract: The present invention relates to a computer-implemented method for aiding in the guidance of diabetes drug therapy of an individual suffering from diabetes mellitus. The method is based on glucose data from said individual that are received at a processing unit, wherein said glucose data comprise at least three fasting glucose measurement values from said individual, and/or at least three matched pre-prandial glucose measurement values and postprandial glucose measurement values at the same meal from said individual. Further contemplated by the present invention is a device for aiding in the guidance of drug diabetes therapy of an individual suffering from diabetes, said device comprising a processing unit, and a computer program including computer-executable instructions, wherein said instructions, when executed by the processing unit, causes the processing unit to perform the computer-implemented method of the present invention.