i am having diabetes type 2, since 20 years. now on insulin- 14,14,14, short acting insulin and single 18 units long acting insulin. Hb1AC is 7.2, post lunch sugar-300.,post dinner-160, but getting hypoglycemia 4-5 hours after meals-44 to 70 mg,sugar level. iam tobacco chewer-not smoker, i am having retinopathy , age 59 yrs.what is the reason for hypoglycemia? i am medical doctor. pl. opine. thanks