Hi I am a Type 2 currently on Metformin and Linagliptin tablets. I have just send my medical form to the DVLA to renew my HGV licence and after four weeks they have sent me a letter saying I have to sign a declaration that I will in future test at least twice a day and before and during HGV driving. They say it's because I am on tablets that are either in the Sulphonylureas or Glinides category. I'm pretty sure that Metformin is not one of these types and I can't find any evidence that Linagliptin is one either. Am I mistaken or have the DVLA lost the plot? Many Thanks Mike