title: Instability of amitriptyline base.
mesh_terms: D000639:Amitriptyline; D002849:Chromatography, Gas; D002855:Chromatography, Thin Layer; D004355:Drug Stability; D009682:Magnetic Resonance Spectroscopy; D013053:Spectrophotometry
chemical_list: D000639:Amitriptyline