A stable composition comprising 2-S-(n-Butylsulfonylamino)-3-[4-(4-(piperidin-4-yl)butyloxy)phenyl]propionic acid monohydrochloride monohydrate (Tirofiban hydrochloride) as active pharmaceutical ingredient and method for the preparation is disclosed. The composition exhibits an improved chromatographic profile and greater stability with respect to the particulate matter.