Subcutaneous fat loss and systemic dryness

Hi all, I was poisoned by Flagyl one year ago (I know it’s not a fluoroquinolone but I had pretty much the same side effects). Two weeks after taking it my whole body became dry (eyes, skin, nose, mouth, etc.) and also lost muscle mass very quickly. Fat pads under cheeks, hands, feet disappeared overnight. I’m now diagnosed with small fiber neuropathy. Did anyone improve? Is there a way rebuild subcutaneous fat? I made some improvements and gained weight but most of the initial symptoms are still there