Citalopram is an antidepressant drug of the selective serotonin reuptake inhibitor (SSRI) class. Citalopram is typically taken in one dose, either in the morning or evening. Citalopram can be taken with or without food. The absorption of citalopram does not increase when taken with food, but doing so can help prevent nausea. Nausea is often caused when the 5HT3 receptors actively absorbs free serotonin, as this receptor is present within the digestive tract. The 5HT3 receptors stimulate vomiting. This side effect, if present, should subside as the body adjusts to the medication.Citalopram is considered safe and well tolerated in the therapeutic dose range. Distinct from some other agents in its class, citalopram exhibits linear pharmacokinetics and minimal drug interaction potential, making it a better choice for the elderly or comorbid patients.