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Does Olanzapine And Fuoxetine Interact with Ketoconazole?

Olanzapine And Fuoxetine and Ketoconazole have a unknown drug interaction according to U.S. FDA drug labeling data. In addition, in vitro studies have shown ketoconazole, a potent inhibitor of CYP3A activity, to be at least 100 times more potent than fluoxetine or norfluoxetine as an inhibitor of the metabolism of several substrates for this enzyme, including astemizole, cisapride, and midazolam. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This information is based on official FDA drug labeling sourced from OpenFDA and the NIH National Library of Medicine.

Severity
Unknown
Olanzapine And Fuoxetine Class
Atypical Antipsychotic
Ketoconazole Class
Azole Antifungal
Management
Consult your pharmacist
Data Source
U.S. FDA via OpenFDA

What To Tell Your Doctor or Pharmacist

If you are taking Olanzapine And Fuoxetine and your doctor is considering prescribing Ketoconazole (or vice versa), make sure to:

  • Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
  • Ask whether the benefits of combining these medications outweigh the risks for your specific situation
  • Ask what symptoms to watch for that would indicate the interaction is causing problems
  • Never stop or change either medication without first consulting your healthcare provider
💊 Olanzapine And Fuoxetine(Olanzapine And Fluoxetine)+💊 Ketoconazole(T8 Keto Flush)

Severity & Interaction Details

ℹ️
unknown
Interaction documented — severity unclassified
The FDA label notes an interaction but the severity is not classified in our dataset.
Severity scale
MinorContra
On record
Yes
Drug A class
Atypical Antipsychotic
Drug B class
Azole Antifungal
Source
FDA drug label - olanzapine and fuoxetine

What this means in plain English

In addition, in vitro studies have shown ketoconazole, a potent inhibitor of CYP3A activity, to be at least 100 times more potent than fluoxetine or norfluoxetine as an inhibitor of the metabolism of several substrates for this enzyme, including astemizole, cisapride, and midazolam.

About Olanzapine And Fuoxetine and Ketoconazole

Olanzapine And Fuoxetine is an Atypical Antipsychotic, while Ketoconazole is an Azole Antifungal. Ketoconazole is also sold under the brand name Ketodan. Both medications are taken by mouth. Both Olanzapine And Fuoxetine and Ketoconazole carry an FDA boxed warning — the agency's most serious safety designation.

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Data integrity: Every interaction shown is extracted directly from official U.S. FDA drug labeling via openFDA and the U.S. National Library of Medicine (NIH) — no interactions are invented, inferred, or manually edited. Maintained by CheckDrugInteractions.com. See our methodology or report a correction at support@checkdruginteractions.com.

Data sourced from U.S. FDA drug labeling via openFDA and the NIH National Library of Medicine, supplemented with a small number of well-established interactions from curated clinical references. For informational purposes only. Always consult your pharmacist or physician.