Diabetes patient. Sugar level 33.

Hi, My father is a Diabetic and has recently had a finger in his foot amputated. Dressing of the foot is done everyday. Yesterday his sugar suddenly dropped to 33. I have him chocolate, glucon D and candies but it did not go past 65 yesterday night. He woke up again at 35, then I gave him some glocon D and chocolate and it was up to 70. We obviously discontinued the sugar medicine. Ever since, his sugar is fluctuating between 40-90. He is not eating anything. I just give him chocolate and glucon D when his sugar goes down. How can I bring his sugar back to normal? He is not eating anything. He is on the following medication : Glimisave M1 Forte (not giving at the moment) Complamina Retard Chymoral Forte Augmintin 625 Kindly help.