Trazodone is an antidepressant medication primarily used to treat major depressive disorder and, in some cases, anxiety disorders. It works by modulating the levels of serotonin in the brain, which can help improve mood and alleviate symptoms of depression. Trazodone is also commonly prescribed off-label for insomnia due to its sedative effects. As with any medication, it is essential to use trazodone under the guidance of a healthcare professional due to potential side effects and interactions.