iam m64 years ols with the history of cabg 1999 , type 2dm from 1999, i also have thye history of htn from last 30 years, in 2005 i was diagnosed with diaqbitic nephropathy ,amount of 24 hors urine protiene varies from 500mg to 1200mg, on 7th of may 2013 i was suffredfrom nausia , veritigo, and vomitting and fall down on stairs and become unconcionus for 10 mints, immediatly i was hospitalized, and ecg was done withj some blood tests, ecg shows sinus berracardiya , heart rate was up to 40bpm , trigrelicyde was up to 425. crtnine was 1.5, blood urea 125 potassium was 3.5... after 5 hours crtnine level was 2.7 , urea was 91 and potassium was 6.9. i was diagnosed with hyperkalimia and pti was done in emergency. now iam discahred from hospital, diagnosed with ARF- syncope and hyperkalimia, i take insulin human mixtard 30/70 17 unit bbf and 15 unit b/dinner. and fasiting level is 200 to 230 and after 2 hours of meal it jumped to 300 to 350 in glucometer. today doc has now advised me to take tab. metformin hydrochloride sustained release ip100mg along with 16 units bbf and one tab. before dinner with 8 units , i want to know should i take this combination , i afraid from hypoglocemia as i was two time hospitalized due to this. pls suggest me the appro. dose to keep my glucose level near to target levels.. i take medicines. aspirin 75 od, tab atrovastran 20 od. tab amlodipine 5mg bd, and iron folic tab.