Limbix 12.5/5 mg TabDESCRIPTIONLIMBIX combines Amitriptyline, a tricyclic antidepressant andChlordiazepoxide, an anxiolytic. Amitriptyline inhibits the reuptake of norepinephrine and serotonin in brain. This interference with the reuptake is responsible for antidepressant activity of Amitriptyline.C..