I am taking one tab of cetaphine xr 500mg after

Patient: I am taking one tab of cetaphine xr 500mg after breakfast and one after dinner for last one month as per my doctor advice.i am diabetic for last 5 yrs,average in fasting it was near 125-130 but now a days it is above 130 one day it was 180 in fasting,previously I was taking one tab.and my wt.was 77.5 before one yr,as on date i am 70 kg.Is it effect of cetaphine!Never any loose motion only I have pain in lumbar part severly.Plz suggest me what kind of precaution I have to take,regardskishore kumar

Doctor: