Sumatriptan citalopram interaction: "After stopping an MAO inhibitor. After stopping an MAO inhibitor before you can take Celexa. Citalopram is primarily used to treat depression. Celexa is a selective serotonin reuptake inhibitors. Celexa is a selective serotonin reuptake inhibitors. Celexa is an antidepressant drug used to treat depression. Citalopram is primarily used to treat depression. It could be implicated in Celexa insomnia."