Symbyax Dosage

Generic name: olanzapine and fluoxetine hydrochloride
Dosage form: capsule

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Depressive Episodes Associated with Bipolar I Disorder

Adults — SYMBYAX should be administered once daily in the evening, generally beginning with the 6 mg/25 mg (mg equivalent olanzapine/mg equivalent fluoxetine) capsule. While food has no appreciable effect on the absorption of olanzapine and fluoxetine given individually, the effect of food on the absorption of SYMBYAX has not been studied. Dosage adjustments, if indicated, can be made according to efficacy and tolerability. Antidepressant efficacy was demonstrated with SYMBYAX in a dose range of olanzapine 6 mg to 12 mg and fluoxetine 25 mg to 50 mg [see Clinical Studies (14.1)]. The safety of doses above 18 mg of olanzapine and 75 mg of fluoxetine has not been evaluated in adult clinical studies.

Children and Adolescents (10 to 17 years of age) SYMBYAX should be administered once daily in the evening, generally beginning with the 3 mg/25 mg capsule, without regard to meals, with a recommended target dose within the approved dosing range (6/25; 6/50; 12/25; 12/50 mg) [see Clinical Studies (14.1)]. The safety of doses above 12 mg of olanzapine and 50 mg of fluoxetine has not been evaluated in pediatric clinical studies.

There is no body of evidence to answer the question of how long a patient treated with SYMBYAX should remain on it beyond 8 weeks. It is generally accepted that Bipolar I Disorder, including the depressive episodes associated with Bipolar I Disorder, is a chronic illness requiring chronic treatment. The physician should periodically reexamine the need for continued pharmacotherapy.

Treatment Resistant Depression

SYMBYAX should be administered once daily in the evening, generally beginning with the 6 mg/25 mg capsule. While food has no appreciable effect on the absorption of olanzapine and fluoxetine given individually, the effect of food on the absorption of SYMBYAX has not been studied. Dosage adjustments, if indicated, can be made according to efficacy and tolerability. Antidepressant efficacy was demonstrated with SYMBYAX in a dose range of olanzapine 6 mg to 18 mg and fluoxetine 25 mg to 50 mg [see Clinical Studies (14.2)]. The safety of doses above 18 mg/75 mg has not been evaluated in clinical studies.

While there is no body of evidence to answer the question of how long a patient treated with SYMBYAX should remain on it, it is generally accepted that treatment resistant depression (Major Depressive Disorder in adult patients who do not respond to 2 separate trials of different antidepressants of adequate dose and duration in the current episode) is a chronic illness requiring chronic treatment. The physician should periodically reexamine the need for continued pharmacotherapy.

Specific Populations

The starting dose of SYMBYAX 3 mg/25 mg to 6 mg/25 mg should be used for patients with a predisposition to hypotensive reactions, patients with hepatic impairment, or patients who exhibit a combination of factors that may slow the metabolism of SYMBYAX (female gender, geriatric age, nonsmoking status) or those patients who may be pharmacodynamically sensitive to olanzapine. Dosing modification may be necessary in patients who exhibit a combination of factors that may slow metabolism. When indicated, dose escalation should be performed with caution in these patients. SYMBYAX has not been systematically studied in patients >65 years of age or in patients <10 years of age [see Warnings and Precautions (5.21), Use in Specific Populations (8.5), and Clinical Pharmacology (12.3, 12.4)].

Treatment of Pregnant Women — When treating pregnant women with fluoxetine, a component of SYMBYAX, the physician should carefully consider the potential risks and potential benefits of treatment. Neonates exposed to SSRIs or SNRIs late in the third trimester have developed complications requiring prolonged hospitalizations, respiratory support, and tube feeding. [see Use in Specific Populations (8.1)].

Switching a Patient To or From a Monoamine Oxidase Inhibitor (MAOI) Intended to Treat Psychiatric Disorders

At least 14 days should elapse between discontinuation of an MAOI intended to treat psychiatric disorders and initiation of therapy with SYMBYAX. Conversely, at least 5 weeks should be allowed after stopping SYMBYAX before starting an MAOI intended to treat psychiatric disorders [see Contraindications (4.1)].

Use of SYMBYAX with Other MAOIs such as Linezolid or Methylene Blue

Do not start SYMBYAX in a patient who is being treated with linezolid or intravenous methylene blue because there is an increased risk of serotonin syndrome. In a patient who requires more urgent treatment of a psychiatric condition, other interventions, including hospitalization, should be considered [see Contraindications (4.1)].

In some cases, a patient already receiving SYMBYAX therapy may require urgent treatment with linezolid or intravenous methylene blue. If acceptable alternatives to linezolid or intravenous methylene blue treatment are not available and the potential benefits of linezolid or intravenous methylene blue are judged to outweigh the risks of serotonin syndrome in a particular patient, SYMBYAX should be stopped promptly, and linezolid or intravenous methylene blue can be administered. The patient should be monitored for symptoms of serotonin syndrome for five weeks or until 24 hours after the last dose of linezolid or intravenous methylene blue, whichever comes first. Therapy with SYMBYAX may be resumed 24 hours after the last dose of linezolid or intravenous methylene blue [see Warnings and Precautions (5.7)].

The risk of administering methylene blue by non-intravenous routes (such as oral tablets or by local injection) or in intravenous doses much lower than 1 mg/kg with SYMBYAX is unclear. The clinician should, nevertheless, be aware of the possibility of emergent symptoms of serotonin syndrome with such use [see Warnings and Precautions (5.7)].

Discontinuation of Treatment with SYMBYAX

Symptoms associated with discontinuation of fluoxetine, a component of SYMBYAX, SNRIs, and SSRIs, have been reported [see Warnings and Precautions (5.25)].

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