tried to taper off the drug and withdrawal was worse than the flu for several months, sweating, black spots in front of eyes, dilated pupils, insomnia, irritability, nausea, joint, muscle pain. It was horrible. Has anyone else experienced the drug to stop working after several years of helping a lot? I've been off of Cymbalta a year but the aches and pains in joints and muscles are still here (which it did help greatly for that), but my anxiety is terrible now. I have tried other medications but Cymbalta seemed to work up until a point.