Ciba-geigy Corporation

Andreas V Sprecher

Pier G Ferrini

Piperazines of the formula ##STR1## and their salts, in which each of Ar.sub.1 and Ar.sub.2, independently of the other, represents phenyl that is unsubstituted or mono- or di-substituted by C.sub.1 -C.sub.7 -alkyl, C.sub.1 -C.sub.7 -alkoxy, cyano, halogen, trifluoromethyl, amino, C.sub.1 -C.sub.7 -alkylamino, di-C.sub.1 -C.sub.7 -alkylamino and/or by C.sub.1 -C.sub.7 -alkanoylamino, can be used as the active ingredients of medicaments and are manufactured in a manner known per se.

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Oberwil, Switzerland

Andreas V Sprecher