Voriconazole (Vfend®, Pfizer) is a triazole antifungal medication used to treat serious fungal infections. It is used to treat invasive fungal infections that are generally seen in patients who are immunocompromised. These include invasive candidiasis, invasive aspergillosis, and emerging fungal infections.
For the treatment of esophageal candidiasis, invasive pulmonary aspergillosis, and serious fungal infections caused by <i>Scedosporium apiospermum</i> and <i>Fusarium</i> spp.
Voriconazole is a triazole antifungal agent indicated for use in the treatment of fungal infections including invasive aspergillosis, esophageal candidiasis, and serious fungal infections caused by <i>Scedosporium apiospermum</i> (asexual form of <i>Pseudallescheria boydii</i>) and <i>Fusarium</i> spp. including <i>Fusarium solani</i>. Fungal plasma membranes are similar to mammalian plasma membranes, differing in having the nonpolar sterol ergosterol, rather than cholesterol, as the principal sterol. Membrane sterols such as ergosterol provide structure, modulation of membrane fluidity, and possibly control of some physiologic events. Voriconazole effects the formation of the fungal plasma membrane by indirectly inhibiting the biosynthesis of ergosterol. This results in plasma membrane permeability changes and inhibition of growth.
Mechanism of action
Voriconazole binds and inhibits ergosterol synthesis by inhibiting CYP450-dependent 14-alpha sterol demethylase. The inhibition of 14-alpha sterol demethylase results in a depletion of ergosterol in fungal cell membrane.
Route of administration
14-alpha Demethylase Inhibitors
Antiinfectives for Systemic Use
Antimycotics for Systemic Use
Chemical Actions and Uses
Cytochrome P-450 CYP2C19 Inhibitors
Cytochrome P-450 CYP2C19 Inhibitors (moderate)
Cytochrome P-450 CYP2C19 Substrates
Cytochrome P-450 CYP2C9 Inhibitors
Cytochrome P-450 CYP2C9 Inhibitors (moderate)
Cytochrome P-450 CYP2C9 Substrates
Cytochrome P-450 CYP3A Inhibitors
Cytochrome P-450 CYP3A4 Inhibitors (strong)
Cytochrome P-450 CYP3A4 Substrates
Cytochrome P-450 Enzyme Inhibitors
Drug-Related Side Effects and Adverse Reactions
Heterocyclic Compounds, 1-Ring
Hormones, Hormone Substitutes, and Hormone Antagonists
Metabolic Side Effects of Drugs and Substances
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs
QTc-Prolonging Agents (Indeterminate Risk and Risk Modifying)
Drug Info/Drug Targets: DrugBank 3.0: a comprehensive resource for 'omics' research on drugs. Knox C, Law V, Jewison
T, Liu P, Ly S, Frolkis A, Pon A, Banco K, Mak C, Neveu V, Djoumbou Y, Eisner R, Guo AC, Wishart DS.
Nucleic Acids Res. 2011 Jan; 39 (Database issue):D1035-41. | PMID:21059682