Hi, welcome to our site. I am Dr Saumya Mittal. Read your query. That is a very significant question and i appreciate your problem. I will try my best to answer your query There are several possbile causes for this. i will list them out. You need to see which may be the possible cause. There is a possibility that the insulin is being administered im/iv accidentally instead of subcutaneous root. So make sure about that. Make sure that his eating pattern remains the same. Has his appetite reduced. Check that the insulin used and the syringe are of the same strength and mixture. Check his creatinine levels. Sometimes when the creatinine rises, the need for insulin reduces. So check creatinine out too. There is ofcourse something called as the honey moon phase where the pancreas start secreting some insulin before failing completely. I hope this helps you. Inform the reports mentioned above so i can be of help further. Best of luck. I have given you the answer to the maximum considering the information provided. The results of the tests could further enhance my answer to you. Please do understand that some details could be extracted from a detailed history and examination. Looking forward to your return query with the details asked so that I can help you further. (If the answer has helped you, please indicate this)