Abstract: The invention relates to novel diphenylpropylamine derivatives of the general formula (I). ##STR1## R.sup.1 stands for hydrogen or a methyl group; R.sup.2 stands for hydrogen, a methyl or n-decyl group;Z means a phenyl group substituted by R.sup.3, R.sup.4 and R.sup.5, whereinR.sup.3 means hydrogen, fluorine, chlorine or bromine, or a nitro, C.sub.1-12 alkyl, C.sub.1-4 alkoxy, phenoxy or benzyloxy group;R.sup.4 and R.sup.5 represent hydrogen, chlorine or a hydroxy, alkoxy, benzyloxy, acetamino or carboxy group; orR.sup.4 and R.sup.5 together form a methylendioxy group;orZ may stand for a 4-methoxynaphtyl or 4-ethoxy-naphthyl group; andR.sup.6 stands for hydrogen or fluorine, with the proviso that each of R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.6 cannot simultaneously stand for hydrogen, as well as their physiologically acceptable acid addition salts.The invention also relates to a process for the preparation of these compounds and to the pharmaceutical compositions containing these compounds.