Hi i am Dr Ahmed Aly thanks for using healthcaremagic site , I had gone through your question and understand your concerns .. In my opinion cymbalta maybe used as a painkiller and will help you sleep but its main action is an antidepressant if you want to stop it you may use NSAIDs like aleve when needed , steroid pills or injections are of good value , methotrexate , pregabalin , hot massages with topical gels , physiotherapy , wearing a knee support will be effective for most of cases . Try to avoid heavy lifting , overweight , vigorous movements , avoid bending your knee and standing for a long time , bad sitting or sleeping postures . Alternative medicine may be helpful like fish oil , plant oil , tai-chi . Please click and consider a 5 star rating with some positive feedback if the information was helpful. Wish you good health, Any further clarifications feel free to ask.