Preclinical evidence on the psychotropic profile of fluvoxamine

Abstract

Serotonin (5-HT) reuptake inhibitors (SSRIs) such as fluvoxamine are interesting compounds. Initially launched as antidepressants, they have been found to be active in various psychiatric disorders besides depression, including obsessive-compulsive disorder, panic disorder, and eating disturbances. Preliminary data suggest their efficacy in alcohol and drug abuse, aggression, and posttraumatic stress disorder as well. Along with those clinical findings, new preclinical data have emerged. For example, fluvoxamine has demonstrated activity in various models of anxiety in rodents. Its anxiolytic activity can be clearly discriminated from that of the benzodiazepines. In the DRL 72-sec paradigm, fluvoxamine exhibits a good antidepressant profile, similar to those of imipramine and flesinoxan. Studies have shown that fluvoxamine does not down-regulate beta-adrenoceptors; apparently, that property is not a conditio sine qua non for antidepressant activity. Results of studies of the mechanism of action of fluvoxamine in which drug discrimination tests were performed with rats and pigeons suggest that the fluvoxamine stimulus is not (or is only to a very limited degree) dependent on activation of 5-HT1A receptors or 5-HT1B/1D receptors, or both. Experimentation is ongoing in those animal models.