Elavil is an effective medicine that is used in dual diagnosis treatment for addiction, as well as to treat mood disorders in drug and alcohol rehabilitation centers. Elavil also helps to treat eating disorders and the wounding or blazing feelings that arise after shingles infectivity and some other neurologic pain disorders. Elavil medicine is a successful treatment for traumatic limb injuries, headaches and facial nerve diseases. This medicine is also used to treat minor pain from substance use disorders. Elavil is approved in drug rehabilitation services for SUD pain. It is a tricyclic antidepressant that mainly affects the neurotransmitter serotonin by lessening its absorption. It effectively works on the central nervous system and this causes a cut in signs of depression and nervousness.