Earlier trials using antidepressants that increase certain brain chemicals, such as, serotonin and noradrenalin have shown efficacy in controlling the mood swings of the illness for many people. These studies also document efficacy in controlling physical disorders, including headaches, migraines, irritable bowel, neurodermatitis (skin rash), fibromyalgia, premenstrual syndrome, and tempomandibular joint dysfunction (TMJ).