My understanding is that Cymbalta is an antidepressant but also good for chronic pain. I have been taking it for a few years, I don’t notice any major side effects. The thing is, remember the side effects for all antidepressants are strongest in the first week or two. Plus it takes several weeks for the med to work, so keep that in mind.
With me however, and probably for most people with chronic pain/fibromyalgia, Cymbalta by itself will not be sufficient. I am taking cymbalta, lyrica, CBD capsules, tylenol, and now low dose naltrexone (LDN) right now. It’s a “cocktail” of drugs. They all seem to help, and the total of all of them helps better.
I highly recommend asking your fibro specialist about low dose naltrexone. When I added this med to my regimen about 3 months ago, I was very impressed with the results. It is a relatively new med, and also helps with sleep, and seems to also be helping with my energy level (probably because it helps with sleep).
Best of luck!