Celexa Disease Interactions

Adult and pediatric patients with depression and other psychiatric disorders may experience worsening of their symptoms and may have the emergence of suicidal thoughts and behavior. Patients should be monitored appropriately and observed closely for worsening of their symptoms, suicidality or changes in their behavior, especially during the first few months of treatment, and at times of dose changes. Families and caregivers should be advised of the need for close observation and communication with the treating physician. Discontinuing the medication should be considered if symptoms are persistently worse, or abrupt in onset. It may be prudent to refrain from dispensing large quantities of medication to these patients.

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Citalopram (racemic) and escitalopram (the more pharmacologically active S-enantiomer) are extensively metabolized and only small amounts are excreted unchanged in the urine. No dosage adjustments are necessary in patients with mild to moderate renal impairment, as the oral clearance of citalopram has been shown to decrease only modestly (17%) in these patients compared to those with normal renal function. There is no information on the pharmacokinetics of citalopram or escitalopram in patients with severe renal impairment (CrCl < 20 mL/min). Therapy with these agents should be administered cautiously in such patients.

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Treatment with SSRI antidepressants can cause hyponatremia. Caution should be used when treating patients with hyponatremia or at greater risk of hyponatremia such as the elderly, patients taking diuretics or who are volume depleted.

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Selective serotonin reuptake inhibitors (SSRIs) are primarily metabolized by the liver. The plasma concentrations of SSRIs and their metabolites may be increased and the half-lives prolonged in patients with impaired hepatic function. Dosage adjustments may be necessary in accordance with the individual product package labeling.

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Selective serotonin reuptake inhibitors (SSRIs), like other antidepressants, may occasionally cause or activate mania or hypomania. The reported incidence ranged from 0.1% to 2% in premarketing testing of several SSRIs. Patients with bipolar disorder are generally more likely to experience mania from antidepressants. Therapy with SSRIs should be administered cautiously in patients with a history of mania or bipolar disorder. Prior to initiating treatment, it is recommended to adequately screen patients for bipolar disorder, including a family history of suicide, bipolar disorder, and depression.

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The use of selective serotonin reuptake inhibitors (SSRIs) has been associated with altered platelet function. Petechiae, purpura, ecchymosis, increased bleeding times, epistaxis and gastrointestinal hemorrhage have been reported. Therapy with SSRIs should be administered cautiously in patients with severe active bleeding or a hemorrhagic diathesis.

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Some SSRI antidepressants such as fluoxetine and citalopram have shown to cause QT interval prolongation and ventricular arrhythmias including Torsade de Pointes. These drugs should be used with caution in patients with congenital QT syndrome, a previous personal or family history of QT prolongation, and ventricular arrhythmia. Consider periodic EKG assessment on these patients. Treatment should be discontinued and a cardiac evaluation should be considered if a patient develops signs or symptoms of ventricular arrhythmia.

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Selective serotonin reuptake inhibitors (SSRIs) may trigger seizures in approximately 0.2% of patients, and some of them are not recommended in patients with unstable epilepsy. Therapy with SSRIs should be administered cautiously in patients with seizure disorders.

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The use of selective serotonin reuptake inhibitors (SSRIs) has rarely been associated with hyponatremia, sometimes secondary to development of the syndrome of inappropriate secretion of antidiuretic hormone (SIADH). These events have generally been reversible following discontinuation of SSRI therapy and/or medical intervention. SSRI-related hyponatremia may be more common in elderly female patients and those who are volume-depleted or receiving concomitant diuretic therapy. Caution may be warranted when SSRI therapy is administered in these patients and patients with preexisting hyponatremia or SIADH. Serum electrolytes, especially sodium as well as BUN and plasma creatinine, should be monitored regularly.

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The use of selective serotonin reuptake inhibitors (SSRIs) may occasionally cause significant weight loss, which may be undesirable in patients suffering from anorexia, malnutrition or excessive weight loss. Anorexia may occur in approximately 5% to 10% of patients. Weight change should be monitored during therapy if an SSRI is used in these patients.

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