Fluvoxamine is a medication used to treat obsessive-compulsive disorder (OCD). It helps to reduce nagging/unwanted thoughts (obsessions) and urges to perform repetitive tasks (such as compulsive counting, hand washing, checking) that interfere with daily life. Fluvoxamine is a selective serotonin reuptake inhibitor (SSRI), which helps restore the balance of serotonin in the brain.