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[Drug-induced pneumonitis due to sirolimus: an interaction with atorvastatin?]

A Paris1, F Goupil, E Kernaonet

  • 1Service des maladies respiratoires, centre hospitalier Le Mans, 194, avenue Rubillard, 72037 Le Mans cedex, France.

Revue Des Maladies Respiratoires
|January 14, 2012
PubMed
Abstract

Insights

Sirolimus can cause drug-induced pneumonitis in renal transplant patients. Concomitant use of atorvastatin may increase this risk due to liver metabolism competition.

Area of Science:

  • Pharmacology
  • Immunosuppression
  • Transplantation Medicine

Background:

  • Sirolimus is an immunosuppressant commonly used in renal transplantation.
  • It is generally considered to have a favorable safety profile regarding nephrotoxicity.
  • This report investigates potential adverse pulmonary effects associated with sirolimus therapy.

Observation:

  • Four renal transplant recipients on long-term atorvastatin developed respiratory symptoms months after initiating sirolimus.
  • Clinical presentation included lymphocytic alveolitis and organizing pneumonia with diffuse alveolar damage on lung biopsy.
  • Symptoms resolved after sirolimus discontinuation.

Findings:

  • Sirolimus is identified as a cause of drug-induced pneumonitis, primarily manifesting as organizing pneumonia.
  • The study suggests a potential interaction between sirolimus and atorvastatin.
  • This interaction may involve competition for the cytochrome P450 3A4 hepatic degradation pathway.

Implications:

  • Clinicians should be aware of the risk of sirolimus-induced pneumonitis in renal transplant patients.
  • The potential role of atorvastatin in exacerbating this adverse effect warrants consideration.
  • Further research into drug interactions affecting sirolimus metabolism is recommended.

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