I was diagnosed with Fibromyalgia 30 years ago in 1995. I have not had a flare up since 1999 until Dec 2026. I had exactly the symptoms you described with severe muscle pain and muscle wasting. At one point I could barely lift my arms and my husband had to help me get up out of a chair. I also had extreme fatigue. The Dr put me on Duloxetene 30-60 mg daily plus 300mg 3 x daily of Gabapentin. I tried the Gabapentin alone first for a few weeks and found it wasn't effective. So I stopped it and started the Duloxetene which stated working and I gradually got better. My Dr said it actually takes 6 weeks to get the full effect.

As far as the muscle wasting they just say it's due to aging . So I am increasing my protein and also taking protein shakes. Lastly I have started lifting weight for seniors. If anyone has a better or different ideas for muscle wasting please post them.