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Acute cholestatic hepatitis probably associated with risperidone.

Francisca Llinares Tello1, Carmen Hernández Prats, Nuria Bosacoma Ros

  • 1Alicante University General Hospital, Spain. paquillinares@eresmas.com

International Journal of Psychiatry in Medicine
|October 26, 2005
PubMed
Summary

The combination of risperidone and fluoxetine may increase the risk of liver injury. Healthcare providers should monitor liver function tests in patients taking both medications to prevent potential hepatotoxicity.

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Area of Science:

  • Pharmacology
  • Hepatology
  • Clinical Toxicology

Background:

  • Risperidone, an atypical antipsychotic, is generally considered to have a favorable hepatic safety profile compared to older neuroleptics.
  • However, idiosyncratic hepatotoxicity associated with risperidone has been reported, necessitating careful patient monitoring.
  • The potential for drug interactions to exacerbate liver injury risk requires further investigation.

Observation:

  • A case study involving a 64-year-old male patient treated concurrently with risperidone and fluoxetine is presented.
  • The patient experienced acute cholestatic hepatitis after initiating risperidone therapy, evidenced by a rapid elevation in liver enzymes within days of starting the medication.
  • This adverse event occurred despite the patient receiving a low dose of risperidone (2 mg/day) for a short duration.

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Findings:

  • The clinical presentation strongly suggests a probable association between risperidone use, in conjunction with fluoxetine, and the development of acute cholestatic hepatitis.
  • The rapid onset of liver injury indicates a potential synergistic or additive toxic effect between these two pharmacologically active agents.
  • This case highlights a specific instance of drug-induced liver injury (DILI) that warrants attention in clinical practice.

Implications:

  • Baseline liver function tests are recommended prior to initiating risperidone therapy, particularly in patients also prescribed fluoxetine.
  • Regular monitoring of liver function tests during concurrent therapy with risperidone and fluoxetine is crucial for early detection of potential hepatotoxicity.
  • This case underscores the importance of considering drug interactions when assessing the risk of adverse hepatic events in patients undergoing psychotropic medication regimens.