PharmaSaathi

Comprehensive Antifungal Guide

Antifungal Classification

Azoles

Inhibit the synthesis of ergosterol, an essential component of fungal cell membranes.

Examples:

  • Fluconazole: Commonly used for candidiasis and cryptococcal infections. (Resistance: Increasing)
  • Itraconazole: Effective for a range of fungal infections including histoplasmosis. (Resistance: Rare)
  • Voriconazole: Broad-spectrum antifungal, used for serious fungal infections. (Resistance: Emerging)
  • Posaconazole: Used for invasive fungal infections in immunocompromised patients. (Resistance: Rare)
  • Ketoconazole: Used for superficial fungal infections, less common now. (Resistance: Moderate)
  • Clotrimazole: Topical treatment for skin infections. (Resistance: Rare)
  • Miconazole: Used topically for skin and vaginal infections. (Resistance: Rare)
  • Econazole: Effective for skin infections. (Resistance: Rare)
  • Sertaconazole: Topical antifungal for skin infections. (Resistance: Rare)
  • Isavuconazole: Used for invasive aspergillosis and mucormycosis. (Resistance: Emerging)

Echinocandins

Inhibit the synthesis of glucan in the fungal cell wall.

Examples:

  • Caspofungin: Used for invasive candidiasis and aspergillosis. (Resistance: Rare)
  • Micafungin: Effective for esophageal candidiasis. (Resistance: Rare)
  • Anidulafungin: Used for candidemia and invasive candidiasis. (Resistance: Rare)
  • Echinocandins combination therapy: Sometimes used in resistant cases. (Resistance: Low)
  • Caspofungin + Fluconazole: Used for resistant Candida infections. (Resistance: Low)
  • Micafungin + Amphotericin B: Used for severe infections. (Resistance: Low)
  • Anidulafungin + Voriconazole: For difficult fungal infections. (Resistance: Low)
  • Echinocandin-based regimens: Tailored for individual patient needs. (Resistance: Low)
  • Combination antifungal therapy: Explored in clinical trials. (Resistance: Low)
  • Caspofungin for candidemia: First-line treatment option. (Resistance: Rare)

Allylamines

Allylamines inhibit squalene epoxidase, disrupting ergosterol synthesis in fungal cell membranes.

Examples:

  • Terbinafine: Used for dermatophyte infections like athlete's foot. (Resistance: Rare)
  • Naftifine: Effective for superficial fungal infections. (Resistance: Rare)
  • Butenafine: Used topically for tinea infections. (Resistance: Low)
  • Allylamine combination therapy: Explored for enhanced efficacy. (Resistance: Low)
  • Terbinafine + Griseofulvin: Used for resistant dermatophyte infections. (Resistance: Low)
  • Naftifine + Clotrimazole: Combination for tinea. (Resistance: Low)
  • Terbinafine oral therapy: For nail fungus. (Resistance: Rare)
  • Terbinafine topical therapy: Effective for skin infections. (Resistance: Low)
  • Butenafine + Betamethasone: Used for inflammatory fungal infections. (Resistance: Low)
  • Naftifine for tinea corporis: Common treatment choice. (Resistance: Rare)

Pyrimidine Analogues

Pyrimidine analogues interfere with fungal DNA and RNA synthesis.

Examples:

  • Flucytosine: Used for cryptococcal meningitis in combination with amphotericin B. (Resistance: Rare)
  • Flucytosine + Amphotericin B: Synergistic effect for serious infections. (Resistance: Low)
  • Flucytosine for candidiasis: Effective in severe cases. (Resistance: Low)
  • Flucytosine oral therapy: Used for systemic infections. (Resistance: Low)
  • Flucytosine + Voriconazole: Combination for complex fungal infections. (Resistance: Low)
  • Flucytosine for combination therapy: Studied for resistant strains. (Resistance: Low)
  • Flucytosine for cryptococcal treatment: First-line option. (Resistance: Rare)
  • Flucytosine + Rifampicin: Explored in clinical settings. (Resistance: Low)
  • Flucytosine for urinary tract infections: Used in some cases. (Resistance: Low)
  • Flucytosine monitoring: Essential to prevent resistance. (Resistance: Rare)

Other Antifungals

Includes agents that do not fit into the primary classes but are important for specific infections.

Examples:

  • Griseofulvin: Used for dermatophyte infections of skin, hair, and nails. (Resistance: Low)
  • Ciclopirox: Topical treatment for dermatophyte and yeast infections. (Resistance: Low)
  • Bifonazole: Used for skin infections, effective against fungi and bacteria. (Resistance: Low)
  • Sertaconazole: Topical treatment for tinea and other fungal skin infections. (Resistance: Low)
  • Amorolfine: Effective for nail fungus and skin infections. (Resistance: Low)
  • Tavaborole: Topical treatment for onychomycosis (nail fungus). (Resistance: Low)
  • Isavuconazole: Newer broad-spectrum antifungal for invasive fungal infections. (Resistance: Rare)
  • Ravuconazole: Investigational antifungal for serious infections. (Resistance: Low)
  • Ketoconazole: Older azole used for topical and systemic infections, now limited use. (Resistance: Moderate)
  • Clotrimazole: Widely used for various superficial fungal infections. (Resistance: Low)

Polyenes

Bind to ergosterol in fungal cell membranes, causing cell death.

Examples:

  • Amphotericin B: Used for severe systemic fungal infections. (Resistance: Rare, but possible)
  • Nystatin: Used topically for candidiasis. (Resistance: Rare)
  • Liposomal Amphotericin B: Less toxic formulation for severe infections. (Resistance: Rare)
  • Amphotericin B lipid complex: Another less toxic option for severe infections. (Resistance: Rare)
  • Amphotericin B deoxycholate: Traditional formulation, more toxic. (Resistance: Rare)
  • Nystatin oral suspension: Used for oral thrush. (Resistance: Rare)
  • Nystatin powder: Topical use for skin infections. (Resistance: Rare)
  • Amphotericin B for cryptococcal meningitis: Effective treatment option. (Resistance: Rare)
  • Nystatin for cutaneous candidiasis: Topical treatment option. (Resistance: Rare)
  • Amphotericin B for histoplasmosis: Treatment in severe cases. (Resistance: Rare)

Usage Guidelines

Antifungal drugs are used to treat various fungal infections, including:

Common Side Effects

Antifungal medications can cause various side effects, including:

References