A method for treatment of arterial hypertension or indirectly or directly related diseases, wherein said method comprises orally administering to a subject in need of such treatment an effective amount of a combination of (3S,3S′) 4,4′-disulfanediylbis(3-aminobutane 1-sulfonic acid) or a pharmaceutically acceptable salt or solvate thereof and enalapril, wherein an hypotensive effect occurs within the first 2 hours after administration of said combination, and wherein the weight ratio of (3S,3S′) 4,4′-disulfanediylbis(3-aminobutane 1-sulfonic acid) relative to enalapril is 100/1.