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Updated: Jun 3, 2026

Human Liver Microphysiological System for Assessing Drug-Induced Liver Toxicity In Vitro
Published on: January 31, 2022
Severe hepatotoxicity associated with the combination of spiramycin plus metronidazole
Rola Hussein1, Mustapha El-Halabi, Ola Ghaith
1Division of Gastroenterology, Department of Medicine, American University of Beirut Medical Center, Beirut, Lebanon.
Abstract:
Drug-induced liver injury (DILI) is a leading cause of acute liver failure and is the most frequent reason for post-marketing drug withdrawal. The spectrum of liver injury is wide, ranging from mild and subclinical injury, noticeable only on routine biochemical testing, to fulminant liver failure and death. Antibiotics, as a group, are a leading cause of DILI. We herein describe 4 patients who developed moderate to severe hepatotoxicity after exposure to a commercially - available combination of two antibiotics - spiramycin and metronidazole - commonly used for the treatment and prevention of periodontal infections. No other aetiology for liver injury could be identified in all cases. Two patients recovered spontaneously, and two had a more severe course, one responding to corticosteroids and mycophenolate mofetil and the other requiring liver transplantation for subacute massive necrosis.
Insights
Drug-induced liver injury (DILI) from antibiotics is common. This study details four cases of severe liver injury caused by spiramycin and metronidazole, highlighting the need for vigilance.
Area of Science:
- Hepatology
- Pharmacology
- Infectious Diseases
Background:
- Drug-induced liver injury (DILI) is a significant cause of acute liver failure and drug withdrawals.
- Antibiotics are frequently implicated in DILI, presenting a wide spectrum of liver damage.
- Periodontal infections are commonly treated with antibiotic combinations.
Observation:
- Four patients developed moderate to severe liver injury after taking spiramycin and metronidazole.
- No alternative causes for liver injury were identified in these patients.
- The clinical course varied, with two patients recovering spontaneously.
Findings:
- Two patients experienced severe hepatotoxicity, one requiring immunosuppressants (corticosteroids and mycophenolate mofetil).
- One patient with severe DILI necessitated a liver transplant due to subacute massive necrosis.
- Spiramycin and metronidazole combination therapy was linked to significant liver injury.
Implications:
- This case series underscores the potential hepatotoxicity of the spiramycin-metronidazole combination.
- Clinicians should consider DILI when evaluating liver injury in patients using these antibiotics.
- Further research into the mechanisms and risk factors for antibiotic-induced liver injury is warranted.
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