Fluvoxamine is a medication which functions as a selective serotonin reuptake inhibitor (SSRI) and σ1 receptor agonist. Fluvoxamine is used primarily for the treatment of obsessive-compulsive disorder (OCD), and is also used to treat major depressive disorder (MDD), and anxiety disorders such as panic disorder and posttraumatic stress disorder (PTSD). Fluvoxamine is a potent and selective serotonin reuptake inhibitor with approximately 100-fold affinity for the serotonin transporter over the norepinephrine transporter. It has negligible affinity for the dopamine transporter or any other receptor, with the sole exception of the σ1 receptor. It behaves as a potent agonist at this receptor and has the highest affinity of any SSRI for doing so. This may contribute to its antidepressant and anxiolytic effects and may also afford it some efficacy in treating the cognitive symptoms of depression.
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