Citalopram is used to treat depression, including major depressive disorder (MDD). It is an antidepressant that belongs to a group of medicines known as selective serotonin reuptake inhibitors (SSRIs). Citalopram (Celexa) is a medication that treats depression. It increases the amount of serotonin in your brain. Citalopram is an antidepressant (selective serotonin reuptake inhibitor) and is used to treat depression. Learn about side effects, interactions and indications. Overview: Citalopram is used to treat depression. It is thought to work by increasing the amount of a natural chemical called serotonin in the brain. Common side effects may include nausea. Celexa (citalopram hydrobromide) used to treat the symptoms of depression. Learn side effects, dosage, drug interactions, warnings, patient labeling, reviews, and more. Learn about citalopram (Celexa) usage and dosing. Read the latest news and reviews about the drug as well as potential side effects and popular alternatives. Celexa is an antidepressant prescription medicine used to treat depression and major depressive disorder. Celexa may cause serious side effects. Celexa (citalopram) is a brand-name drug that’s used to treat depression in adults. Celexa comes as a tablet that you swallow. Learn about side effects, dosage, uses, and more. Celexa (citalopram) is an antidepressant in a group of drugs called selective serotonin reuptake inhibitors (SSRIs). Includes Celexa side effects, interactions and indications. Citalopram, sold under the brand name Celexa among others, is an antidepressant of the selective serotonin reuptake inhibitor (SSRI) class. [7][9] It is used to treat major depressive disorder, obsessive–compulsive disorder, panic disorder, and social anxiety disorder. [7] The antidepressant effects may take one to four weeks to occur. [7].