Dean, I am diabetic, and on a 2 week liquid diet. I have continued to take my metformin, a mild, low dose, and have simply checked my blood sugar periodically. I remain in the low abnormal range of about 110-160mg/dl...If it gets below 70mg/dl, consistently, I'll call my MD and hold my meds until I hear back from him.
Interestingly, no one mentioned what to do about my diabetic meds with me either, but I am a nurse, and this is the kind of stuff I am used to dealing with.