Hi
@Time2Change. ND veteran here. . Can you be more specific about what you define as Newcastle diet? My understanding is the following the regime set out by Taylor et al.
https://www.ncl.ac.uk/media/wwwnclacuk/newcastlemagneticresonancecentre/files/201809 Sample Recipes & meal plans.pdf Basically it would be 3 meal replacement shakes and some servings of low calorie vegetables, such as salad greens or veg soups without added starcy veg, or thickeners such as flour, rice pulses. I would imagine it is virtually impossible to follow if your meals, prepared by someone else, have unknown ingredients.
As for the medication, that is not something we can advise about. During my Newcastle diet, which was in the very early days, of the research, 2011, I was monitored weekly by a pharmacist, for blood pressure, ketones in urine. Also monitored monthly at GP surgery, to check blood glucose, and weight. The decision to stop medication was made in consultation with HCPs as my weight and BG reduced. I doubt NHS GPS would still be able to offer such support in post covid pandemic era, but I would certainly not advocate going alone on this ND regime , especially when medication is concerned.