I started taking bumetanide ).5mg tablets on Wed. @24 hours later I experienced a moderate to sever backache which lasted four hours. I took no bumetanide the day the pain occurred. The next day, Fri. I again took 0.5mg of bumetanide,,and again on Sunday, today. I have now developed moderate to severe back pain in the lower right side. Is my pain caused by bumetanide?