Citalopram, sold under the brand name Celexa among others, is an antidepressant of the selective serotonin reuptake inhibitor (SSRI) class. It is used to treat major depressive disorder, obsessive compulsive disorder, panic disorder, and social phobia. Benefits may take one to four weeks to occur. It is taken by mouth. DESCRIPTION. Celexa® (citalopram HBr) is an orally administered selective serotonin reuptake inhibitor with a chemical structure unrelated to that of other SSRIs or of tricyclic, tetracyclic, or other available antidepressant agents. Citalopram is the generic form of the brand-name antidepressant Celexa, which is used to treat depression. In addition to depression, citalopram is also used for treating: Citalopram is an antidepressant medication that is approved for the treatment of major depressive disorder (MDD). Celexa is an antidepressant medication of the selective serotonin reuptake inhibitor (SSRI) class. Learn about Celexa dosing, symptoms, and proper use here. Information about citalopram (Celexa) an antidepressant drug prescribed for depression, anxiety, OCD, panic disorder, PTSD, and premenstrual dysphoric syndrome. Drug Information on CeleXA (citalopram) includes drug pictures, side effects, drug interactions, directions for use, symptoms of overdose, and what to avoid. Citalopram is an antidepressant (selective serotonin reuptake inhibitor) and is used to treat depression. Learn about side effects, interactions and indications. Celexa (citalopram hydrobromide) is a type of antidepressant called a selective serotonin reuptake inhibitor indicated for the treatment of depression. Citalopram is used to treat depression. Citalopram is in a class of antidepressants called selective serotonin reuptake inhibitors (SSRIs). It is thought to work by increasing the amount of serotonin, a natural substance in the brain that helps maintain mental balance.