Is It Safe To Take Huminsulin And Cetapin Inspite Of Normal FBS ?

good morning dr,i am dr gafoor(rtd homoeo dmo)my wife zuhara is having diabetes for 13 years.now takig huminsulin 30/70.morning 17 ml.night 34 ml.+cetapin xr 500 bd.even though fbs is 145 or 155 or 150 etc.her weight is 49 kg.height 156 cm.pl help me