1-(N-phenylaminoalkyl)-piperazine derivatives of formula (I), (R = H, alkyl-CO, cycloalkyl-CO, substituted cycloalkyl-CO or monocyclic heteroaryl-CO; R1 = H or lower alkyl; R2 = halogen, alkoxy, phenoxy, NO2, CN, acyl, NH2, NH(acyl), alkyl-SO2NH, alkoxycarbonyl, NH2CO, (alkyl)NHCO, (alkyl)2NCO, (acyl)NHCO, CF3 or polyfluoroalkoxy; B = benzyl or mono- or bicyclic aryl or heteroaryl, all optionally substituted) bind to 5HT1A receptors and are useful for the treatment of neuromuscular dysfunctions of the lower urinary tract. The use of these compounds for the preparation of a medicament for this treatment is claimed, and some of the compounds (with restricted B values) are claimed per se.