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Published on: April 19, 2017
Voriconazole in clinical practice
Małgorzata Mikulska1, Andrea Novelli, Franco Aversa
1Division of Infectious Diseases, University of Genoa and San Martino University Hospital, Genoa, Italy. m.mikulska@unige.it
Abstract:
Invasive fungal diseases are associated with significant morbidity and mortality in immunocompromized patients. Voriconazole is the first line treatment of invasive aspergillosis, and has been successfully used in other invasive fungal infections, such as candidiasis, fusariosis or scedosporidiosis. Voriconazole has non-linear pharmacokinetics and undergoes extensive hepatic metabolism by the cytochrome P450 system that depends on age, genetic factors, and interactions with other drugs. Thus, significant interpatient variability is observed after administration of the same dose. Additionally, the therapeutic window is narrow, with high risk of side effects at serum levels 3-5 times higher than the minimal threshold for efficacy. Therefore, the knowledge of pharmacological properties, metabolism, interactions, dosage indications in various populations and side effects is crucial. Therapeutic drug monitoring can help maximize the efficacy and minimize the risk of toxicity. Pharmacological, mycological and clinical aspects of the treatment with voriconazole are summarized in order to optimize its use in daily clinical practice.
Insights
Voriconazole is a crucial antifungal for immunocompromised patients but has variable effects due to metabolism and drug interactions. Therapeutic drug monitoring is vital for optimizing voriconazole efficacy and safety.
Area of Science:
- Medical Mycology
- Clinical Pharmacology
Background:
- Invasive fungal diseases (IFDs) pose significant risks in immunocompromised individuals.
- Voriconazole is a primary treatment for invasive aspergillosis and other serious fungal infections.
- Voriconazole exhibits complex pharmacokinetics, including non-linear absorption and extensive hepatic metabolism via cytochrome P450 enzymes.
Purpose of the Study:
- To provide a comprehensive overview of voriconazole's pharmacological properties.
- To highlight the importance of understanding voriconazole metabolism, drug interactions, and population-specific dosing.
- To emphasize the role of therapeutic drug monitoring in optimizing voriconazole treatment outcomes.
Main Methods:
- Review of pharmacological, mycological, and clinical data related to voriconazole.
- Analysis of factors influencing voriconazole pharmacokinetics, including age, genetics, and drug-drug interactions.
- Evaluation of voriconazole's narrow therapeutic index and potential toxicities.
Main Results:
- Voriconazole's efficacy is influenced by significant interpatient pharmacokinetic variability.
- High serum levels, 3-5 times above the efficacy threshold, are associated with increased toxicity.
- Optimal voriconazole use requires careful consideration of its pharmacological profile and patient-specific factors.
Conclusions:
- Understanding voriconazole's complex pharmacology is essential for effective clinical management.
- Therapeutic drug monitoring is a key strategy to enhance voriconazole efficacy and mitigate toxicity.
- This review aims to optimize voriconazole utilization in clinical practice through a synthesis of key aspects.
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