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Miopatia Tóxica Associada à Interação Sinvastatina–Claritromicina Durante Terapêutica de Erradicação de Helicobacter Pylori: Relato De Caso
Toxic Myopathy Associated with Simvastatin–Clarithromycin Interaction During Helicobacter Pylori Eradication Therapy: A Case Report

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Eduardo Martins - Corresponding Author

Eduardo Martins - ehdmartins@gmail.com
Unidade de Saúde Familiar Corgo, Unidade Local de Saúde Trás-os-Montes e Alto Douro, Vila Real, Portugal.
Rua Dr. Manuel Cardona, 5000-557 Vila Real

Catarina Fernandes
Catarina Borges
Michel Mendes

Abstract

Helicobacter pylori infection has a high prevalence in Portugal and its eradication is a crucial measure in the prevention of gastric cancer. Clarithromycin-based eradication regimens continue to be frequently used in clinical practice.
We present a case of a patient who developed severe toxic myopathy associated with the co-administration of simvastatin and clarithromycin, prescribed as part of an Helicobacter pylori eradication regimen.
This case reinforces the importance of a thorough review of patients’ usual medication before starting new therapies and the need for vigilance regarding predictable drug interactions, particularly those involving statins and drugs that inhibit their metabolismo.

Keywords: Clarithromycin/adverse effects; Drug Therapy, Combination/adverse effects; Helicobacter Infections/ drug therapy; Muscular Diseases/chemically induced; Myotoxicity/etiology; Simvastatin/adverse effects

Article Details

1.
Martins E, Fernandes C, Borges C, Mendes M. Toxic Myopathy Associated with Simvastatin–Clarithromycin Interaction During Helicobacter Pylori Eradication Therapy: A Case Report. Gaz Med [Internet]. 2026 Jan. 28 [cited 2026 Jan. 30];1(1). Available from: https://www.gazetamedica.pt/index.php/gazeta/article/view/991
Section
CLINICAL CASE