Antifungals Flashcards
(22 cards)
Superficial Mycoses
— topical, po
- Griseofulvin
- Nystatin
- Terbinafine (fungicidal)
- Azoles
- Miscellaneous Agens
– Fungistatic – MOA: Unknown – PK: ⬆️ absorption w/ fatty foods – PO – Use: tx of dermatophyte infxn/ tinea
Griseofulvin
– Chem: Polyene
– MOA: Binds to ergosterol
– DOC: yeast infection
– Topical
Nystatin
– Fungicidal
– MOA: Inhibition of Squalene Epoxidase
Terbinafine
– MOA: inhibition of fungal CYP450
– Imidazoles: less selective in inhibiting human CYP450
Azoles
Imidazoles
• Keroconazole — Topical Azoles - Clotrimazole - Miconazole - Ticonazole
Triazoles
— more selective un (-) fungal CYP450
- Fluconazole
- Itraconazole
- Voriconazole
- Posaconazole
Miscellaneous Agents
- Ap- Ap Solution
- Whitfield’s Ointment
- Selsun Blue
- KI solution
Ap ap Solution
Salicylic Acid
Whitfield’s Ointment
SA + Benzoic Acid
Selsun Blue
Selenium sulfide “antidandruff”
KI solution
Sporotrichosis DOC
Less Serious Mycoses
- Itraconazole
- Ketoconazole
- Fluconazole
– mild to moderate systemic fungal infxn
– 2nd line: Systemic/ Endemic Mycoses
Itraconazole
– Tx of cutaneous candidiasis
– Withdrawn
Ketoconazole
– DOC: cryptococcal meningitis
– PK: ⬆️ H2O solubility
– excellent BBB penetration
– highest sensitivity in (-) fungal CYP450
Fluconazole
Serious Mycoses
- Amphotericin B
- Flucytosine
- Voriconazole
- Echinocandins
- Posoconazole
– Grandfather of all antifungals – MOA: binds to ergosterol — cytoplasmic leakage – Reduce fungal burden – Combined with Flucytosine – AE: Nephrotoxic – DOC: Systemic/ Endemic Mycoses
Amphotericin B
– Pyrmidine analog
– MOA: Converted to FUTP & FdUMP
– Combined with Amphotericin B
– NEVER given alone
Flucytosine
DOC for Aspergillosis
Voriconazole
– MOA: (-) Synthesis of B [1,3] D glucan
- Micafungin
- Caspofungin
- Anidulafungin
Echinocandins
DOC for Mucormycosis
Posaconazole