The info in the nice guidelines seems to support your nurse suggesting medication, but as your recent HbA1c of 54 is just slightly above the medication threshold of HbA1c 53, and due to your reluctance to start medication, the nurse could be giving some leeway. Have you been given a target to aim for,
@John 2 ? Also a date for another HbA1c test? Your levels need to be monitored.
It is not clear whether or not you brought the level down with or without medication. It would help to give more specific advice if you made that clear in your profile.