Hi, welcome to our site. I am Dr Saumya Mittal, MD. Read your query. That is a very significant question and i appreciate your problem. I will try my best to answer your query I think he wants to put of the pain killers simly because the pain killers may be affecting your other systems like the kidneys. I would probably have suggested the same However, I would probably also suggest a prescription of methylcobal and pregabalin while you await the surgery (I wish you had mentioned what the surgery was for, and how long do you wait approximately before it would be done) I hope this helps you. Inform the reports mentioned above/if any other so I can be of help further. 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. Please feel free to ask another query. I would be glad to help you. 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) Best of luck.