Abstract: The invention relates to substituted nitrogenous heterocycles derivatives of general formula (I) ##STR1## in the racemic or optically pure form and/or in the form of cis/trans isomers, their pharmaceutically acceptable salts, and their use for preparing drugs having psychrotropic activity, especially antidepressant activity.

Abstract: The invention relates to benzhydryloxyethylpiperidine derivatives corresponding to one of the formulae below: ##STR1## in which: R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which are identical or different, represent a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an aryloxy group or the trifluoromethyl group,R represents hydrogen, a cation, an alkyl group, an aryl group or an arylalkyl group, andn is equal to 0 or 1, and their pharmaceutically acceptable salts, useful in the treatment of spasmodic states and allergies.

Abstract: The present invention relates to benzhydryloxyethylpiperazine derivatives of the formula: ##STR1## It also relates to processes for the preparation of the said derivatives and pharmaceutical compositions in which they are present. The said derivatives have an antihistaminic activity without a sedative component.

Abstract: The invention relates to 1-[(1,1-diphenyl)-1-alkenyl]piperazine derivatives corresponding to general formula I: ##STR1## in which R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5, which are identical or different, represent a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkenyl group, a lower alkoxy group or the trifluoromethyl group; n is an integer between 1 and 3; m is an integer from 0 to 3; Z represents a hydrogen atom, a lower alkyl group or an aryl group of the formula: ##STR2## in which R.sub.6 has the same meaning as R.sub.1, R.sub.2, R.sub.3 or R.sub.4 ; and A is an oxygen atom or a group ##STR3## and to their pharmaceutically acceptable salts. Application: pharmeutical compositions with antidepressant properties.