HI Priya Thank for asking to HCM Diabetic patients always has some kind of health problem particularly in geriatric age group, it is important to watch blood sugar status frequently, developing of sudden hypoglycemia is common phenomenon in this age, get it done HbA1c test if not done, this test will show the average control of diabetes and any underlying diabetic pathology, giving sleep pills in this age is not at all advisable, sleep patrons greatly changed in this age regardless the diabetes, good nursing care and moral support would be much better medicine than any other one,spend more time with your father this will bring his sleep back without any pill, take very good care of your father, convey my Namskar to him.