Described are novel 1-phenylalkylpiperazines having affinity for serotonergic receptors. These compounds and their enantiomers, diastereoisomers, N-piperazine oxides, polymorphs, solvates and pharmaceutically acceptable salts are useful in the treatment of patients with neuromuscular dysfunction of the lower urinary tract and diseases related to 5-HT
1A
receptor activity. Also described are the preparation of the compounds and the pharmaceutical compositions containing them.