At the age of 72 your mother is not for tight glucose control as this would cause more problems than good. The aim would be to keep her HbA1C between 7.5 to 8.5% which would mean her fasting glucose levels should be about 7 and after meal readings of less than about12. If her levels are in this range, then she doesn't require more treatment , but if they are higher then the next option would be to look at short acting insulin before her meals or to look at a mixed insulin, which contains short and long acting insulin, and is injected before breakfast and supper.
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