The present invention relates to the use of compounds being combined selective serotonin (5-HT) reuptake inhibitors (SSRIs) and 5-HT.sub.1A receptor agonists, in particular of 1-[4-(5-cyanoindol-3-yl)butyl]-4-(2-carbamoyl-benzofuran-5-yl)-piperazine or a physiologically acceptable salt thereof or 3-{4-[4-(4-cyano-phenyl)-piperazin-1-yl]-butyl}-1H-indole-5-carbonitrile or a physiologically acceptable salt thereof, for the manufacture of a medicament for the treatment of chronic pain disorders or in treating other conditions where there is hyper-sensitization to painful signals, hyperalgesia, allodynia, enhanced pain perception, and enhanced memory of pain, as well as for the treatment of irritable bowel syndrome (IBS).