Celexa (citalopram) is an antidepressant in a group of drugs called selective serotonin reuptake inhibitors (SSRIs). Includes Celexa side effects, interactions and indications. Citalopram (Celexa) is used for treating depression, obsessive-compulsive disorder (OCD), panic disorder and some eating disorders. “Can I drink alcohol with this medication?” This is a question doctors are asked a lot. 55% of Americans regularly take prescription medications and 30% of Americans have at least one alcoholic drink every day. How to use Celexa. Read the Medication Guide and, if available, the Patient Information Leaflet provided by your pharmacist before you start taking citalopram and each time you get a refill. Celexa should be administered once daily, in the morning or evening, with or without food. Initial Treatment. Celexa (citalopram) should be administered at an initial dose of 20 mg once daily, with an increase to a maximum dose of 40 mg/day at an interval of no less than one week. Citalopram oral tablet (Celexa) is used to treat depression. Learn about side effects, dosage, and more. 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. Information about citalopram (Celexa) an antidepressant drug prescribed for depression, anxiety, OCD, panic disorder, PTSD, and premenstrual dysphoric syndrome. 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. DOSAGE AND ADMINISTRATION. Celexa should be administered once daily, in the morning or evening, with or without food. Initial Treatment. Celexa (citalopram HBr) should be administered at an initial dose of 20 mg once daily, with an increase to a maximum dose of 40 mg/day at an interval of no less than one week.