MCM: FM is frequently comorbid w other disorders (CFS, irritable
bowel S, migraine and muscle tension HA, atypical facial pain,
major depression, and panic disorder.) Suggest a larger family
or spectrum of disorders (including also cataplexy, ADHD,
bulimia, generalized anxiety, obsessive-compulsive disorder,
post-traumatic stress, and social phobia), in which a shared
pathophysiology is suggested by response to anti-depressants.
Hudson JI, Pope HG