Used primarily to treat obsessive-compulsive disorder (OCD), this chemical helps regulate serotonin levels in the brain, improving symptoms like recurring thoughts and compulsive behaviors. It is also prescribed for major depressive disorder and anxiety-related conditions. Due to its action on sigma-1 receptors, research explores its potential in managing inflammation and neurocognitive symptoms, including in conditions like long COVID and depression with cognitive impairment. It may be used off-label for insomnia or social anxiety disorder in certain cases.