Celexa is the brand name for citalopram, a selective serotonin reuptake inhibitor used primarily as an antidepressant. Its therapeutic purpose is to alleviate symptoms of major depressive disorder and, in some cases, anxiety disorders by modulating serotonin activity. The drug functions by selectively blocking the reuptake of serotonin into presynaptic neurons, thereby increasing the extracellular concentration of this neurotransmitter. This elevation of serotonin enhances stimulation of postsynaptic receptors, which contributes to improved mood regulation over time. Pharmacologically, citalopram exhibits high affinity for the serotonin transporter, with minimal interaction with other monoamine transporters or receptors at therapeutic doses. Its metabolic pathway involves hepatic oxidation via the cytochrome p450 enzyme system, particularly cyp2c19, resulting in an active metabolite that contributes to overall pharmacological effect. The clearance of the drug is influenced by genetic polymorphisms affecting enzyme activity, which can lead to variations in plasma concentrations among individuals. Ultimately, sustained elevation of serotonin levels in the central nervous system is believed to underlie the clinical antidepressant response observed with Celexa.

Celexa is the brand name for the selective serotonin reuptake inhibitor citalopram used primarily in the treatment of major depressive disorder. Therapeutically it is prescribed to improve mood and alleviate symptoms associated with depression. The drug functions by selectively blocking the reabsorption of serotonin in the central nervous system. This action increases the availability of serotonin at synaptic clefts and enhances its signaling. The elevation of serotonin levels contributes to mood regulation and emotional stability. Through this mechanism Celexa helps restore neurochemical balance disrupted in depressive states. Clinical studies demonstrate its efficacy in reducing depressive symptoms and improving functional outcomes. The medication is not intended for use in pediatric populations or for conditions other than major depressive disorder.

Celexa may cause nausea especially when first starting the medication. Some users report dry mouth and a mild metallic taste. Drowsiness or fatigue can occur particularly during the initial weeks. Insomnia or difficulty sleeping may also be experienced by some patients. Weight changes such as modest gain or loss have been noted in certain individuals. Sweating particularly at night can be an occasional side effect. Headache and mild dizziness are among the reported symptoms.

Celexa may cause nausea in some patients. It can also lead to dry mouth or mild dizziness. Some individuals experience fatigue or difficulty sleeping. Headaches are another frequently reported symptom. Occasionally, the medication may result in mild sweating or tremors. Sexual dysfunction such as decreased libido or difficulty achieving orgasm is also possible.