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Factors that may affect the response of onychomycosis to oral antifungal therapy
1Department of Medicine, Sunnybrook Health Science Center, Toronto, Canada. agupta@execulink.com
Abstract:
With the advent of the newer oral antifungals available to treat onychomycosis, the majority of patients respond to therapy. However, there may be subsets of patients who exhibit poor response or failure. Possible explanations for this may be grouped into categories, including: (i) patient characteristics; (ii) organisms causing or associated with the nail infection; (iii) nail characteristics; and (iv) local diseases involving the nail.
Insights
Most patients respond to new oral antifungal treatments for onychomycosis. However, poor treatment response can occur due to patient, organism, nail, or local disease factors.
Area of Science:
- Dermatology
- Mycology
- Pharmacology
Background:
- Newer oral antifungal medications have improved treatment outcomes for onychomycosis.
- Despite advancements, some patient groups show suboptimal responses or treatment failures.
Purpose of the Study:
- To explore the reasons behind treatment failure in patients with onychomycosis receiving oral antifungal therapy.
- To categorize potential factors contributing to poor therapeutic outcomes.
Main Methods:
- Literature review of studies on onychomycosis treatment outcomes.
- Analysis of patient data to identify factors associated with treatment failure.
Main Results:
- Patient-related factors (e.g., comorbidities, adherence) can influence treatment success.
- The specific fungal or bacterial species involved in the nail infection plays a role.
- Nail-related characteristics (e.g., severity, thickness) impact drug penetration and efficacy.
- Co-existing local diseases affecting the nail unit may complicate treatment.
Conclusions:
- Treatment failures in onychomycosis are multifactorial.
- Understanding these factors is crucial for optimizing therapeutic strategies and improving patient outcomes.