I am also currently taking cymbalta 60 mg. I also had knee surgery and also taking voltaren or oxycodone for the pain. Only take oxycodone if the pain is extreme, mostly use tylenon extra stregnth or Advil gel caps. Lately my blood sugar is dropping to 47, today it was 68, it's dropped all the way until 39 at one point. Could this be caused by any of these or combinations?