A compound selected from those of formula (I): ##STR00001## wherein: R.sub.3 represents a hydrogen atom, and R.sub.1 and R.sub.2 together with the carbon atoms carrying them form a benzene, naphthalene or quinoline ring structure, each of the ring structures being optionally substituted, or R.sub.1 represents a hydrogen atom, and R.sub.2 and R.sub.3 together with the carbon atoms carrying them form a benzene, naphthalene or quinoline ring structure, each of the ring structures being optionally substituted, n represents 1 or 2, --X-- represents a group selected from --(CH.sub.2).sub.m--O-Ak-, --(CH.sub.2).sub.m--NR.sub.4-Ak-, --(CO)--NR.sub.4-Ak- and --(CH.sub.2).sub.m--NR.sub.4-(CO)--, m represents an integer between 1 and 6 inclusive, Ak represents an optionally substituted alkylene chain, and R.sub.4 represents a hydrogen atom or an alkyl group, Ar represents an aryl or heteroaryl group, its enantiomers, diasteroisomers, and addition salts thereof with a pharmaceutically acceptable acid. Medical products containing the same which are useful in the treatment of conditions requiring a serotonin reuptake inhibitor and/or NK.sub.1 antagonist.