Sertraline is a medication commonly prescribed to treat depression, anxiety disorders, obsessive-compulsive disorder (OCD), and post-traumatic stress disorder (PTSD). It belongs to a class of drugs known as selective serotonin reuptake inhibitors (SSRIs), which work by increasing the levels of serotonin, a neurotransmitter that helps regulate mood. Typically taken as a daily oral tablet, sertraline may take several weeks to show its full effects. Common side effects can include nausea, insomnia, and sexual dysfunction. It is important for patients to consult their healthcare provider for proper dosage and to discuss any potential interactions with other medications.