Description fluvoxamine is an antidepressant which functions pharmacologically as a selective serotonin reuptake inhibitor. though it is in the same class as other ssri drugs, it is most often used to treat obsessive-compulsive disorder.indication for management of depression and for obsessive compulsive disorder (ocd). has also been used in the management of bulimia nervosa.mechanism of action the exact mechanism of action of fluvoxamine has not been fully determined, but appears to be linked to its inhibition of cns neuronal uptake of serotonin. fluvoxamine blocks the reuptake of serotonin at the serotonin reuptake pump of the neuronal membrane, enhancing the actions of serotonin on 5ht1a autoreceptors. in-vitro studies suggest that fluvoxamine is more potent than clomipramine, fluoxetine, and desipramine as a serotonin-reuptake inhibitor.