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Posaconazole
Elizabeth S Dodds Ashley1, Barbara D Alexander
1Division of Infectious Diseases and International Health, Department of Medicine, Duke University Medical Center, Durham, North Carolina 27710, USA.
Abstract:
Invasive fungal infections are occurring with increasing frequency secondary to medical advances in the areas of transplantation, cancer management and autoimmune diseases. Unfortunately, the currently available antifungal armamentarium does not meet the increasing needs of managing infection in these complex patient populations. Posaconazole, a new triazole antifungal agent, is being investigated for its role in treating serious infections due to yeasts and molds. This new drug offers an expanded spectrum of activity over other members of its class. In addition to potent activity against fluconazole-resistant Candida and refractory cases of aspergillosis, posaconazole demonstrates activity against Zygomycetes. Posaconazole is a well-tolerated agent that offers a diminished toxicity profile compared with other currently marketed systemic antifungal agents. Clinical success rates thus far have been promising, although the exact role of this agent in treating and preventing invasive fungal infections is yet to be determined.
Insights
New antifungal posaconazole shows promise for treating invasive fungal infections in complex patients. It offers a broader spectrum of activity and better tolerability than existing options.
Area of Science:
- Mycology
- Infectious Diseases
- Pharmacology
Background:
- Invasive fungal infections (IFIs) are increasing due to advances in immunosuppressive therapies.
- Current antifungal treatments have limitations in spectrum of activity and toxicity.
- Complex patient populations require novel therapeutic options.
Purpose of the Study:
- To investigate the efficacy and safety of posaconazole for treating IFIs.
- To evaluate posaconazole's expanded spectrum of activity against yeasts and molds.
- To compare posaconazole's tolerability with existing systemic antifungal agents.
Main Methods:
- Clinical investigations of posaconazole in patients with IFIs.
- In vitro susceptibility testing against various fungal pathogens.
- Comparative safety and tolerability assessments.
Main Results:
- Posaconazole demonstrates potent activity against fluconazole-resistant Candida and Aspergillus species.
- It also shows activity against Zygomycetes, a challenging group of fungi.
- Posaconazole exhibits a favorable tolerability profile with diminished toxicity compared to other systemic antifungals.
Conclusions:
- Posaconazole is a promising new triazole antifungal agent.
- It offers an expanded spectrum of activity and improved safety profile.
- Further clinical trials are needed to define its definitive role in managing IFIs.
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