Find out how Zoloft is used to treat anxiety, its effectiveness, dosage, side effects, and when it may be the right option for you. Sertraline (Zoloft) is an SSRI used to treat depression, anxiety, OCD, PTSD, and PMDD by increasing serotonin levels to improve mood and emotional balance. ZOLOFT may be administered either continuously (every day throughout the menstrual cycle) or intermittently (only during the luteal phase of the menstrual cycle, i.e., starting the daily dosage. Zoloft is an antidepressant used to treat major depression, obsessive-compulsive disorder, panic disorder, social anxiety, and post-traumatic stress disorder. Sertraline is a medication that increases the amount of serotonin in your brain. Serotonin is a hormone that helps regulate your mood. It treats depression, anxiety, obsessive-compulsive disorder, post-traumatic stress disorder and premenstrual dysphoric disorder. What is this medication? Take this medicine only as directed by your doctor, to benefit your condition as much as possible. Do not take more of it, do not take it more often, and do not take it for a longer time than your doctor ordered. This medicine should come with a Medication Guide. See risks & benefits. Learn more about ZOLOFT® (sertraline HCl), a prescription treatment for depression. Sertraline, sold under the brand name Zoloft among others, is an antidepressant medication of the selective serotonin reuptake inhibitor (SSRI) class [11] used to treat major depressive disorder, generalized anxiety disorder, social anxiety disorder, obsessive–compulsive disorder (OCD), panic disorder, and premenstrual dysphoric disorder. [12] Sertraline (Zoloft) is a prescription oral tablet that is used to treat depression and other mental health conditions. Learn about sertraline's side effects, dosage, cost, warnings, and more. Find patient medical information for Sertraline (Zoloft) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings.