A compound selected from those of formula (I): wherein: R3 represents a hydrogen atom, and R1 and R2 together with the carbon atoms carrying them form a benzene, naphthalene or quinoline ring structure, each of the ring structures being optionally substituted,  or R1 represents a hydrogen atom, and R2 and R3 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 —(CH2)m—O-Ak-, —(CH2)m—NR4-Ak-, —(CO)—NR4-Ak- and —(CH2)m—NR4-(CO)—,  m represents an integer between 1 and 6 inclusive, Ak represents an optionally substituted alkylene chain, and R4 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 NK1 antagonist.