Since the same part of our brains that controls the sleep/wake cycle also controls metabolism (among other things), weight gain is a problem for a lot of us. Since we started treatment for N, I’ve lost 30 lbs and my son has lost 60! Of course meds don’t affect everybody the same way, but if you do have a sleep disorder and it is diagnosed by your sleep doc, you might feel a lot better when you start treatment. That doesn’t mean you don’t have fibromyalgia, though. I have it. My son and I are on adderall, by the way.