Fluconazole: optimized antifungal therapy based on pharmacokinetics.

Abstract:

:Fluconazole, a triazole, inhibits synthesis of ergosterol. The key enzyme of antifungal activity is C-14-Demethylase, which itself depends on Cytochrom-P-450. So drugs that inhibit or induce this enzyme lead to interactions that have to be considered when dosing fluconazole. Oral bioavailability is more than 90% after a 50 mg dose, peak levels are reached after 0.5-1.5 h (empty stomach) or 4 h (with nutrition). A loading dose on the first day leads to steady state levels on the second day. Because of the hydrophilic properties fluconazole penetrates very well into body fluids and tissues. With the M27 method conditions regarding susceptibility testing have been standardized and minimal inhibitory concentrations (MICs) have been established for fluconazole. The linear relation between dose and concentration offers the possibility to treat less susceptible fungi with higher doses, but only when MICs correlate with efficacy and higher doses are tolerated as well. Prospectively randomized studies are rare. With the limited data indications as consensus recommendations are demonstrated. Data regarding high dose therapy with fluconazole in surgical or intensive care patients demonstrate efficacy and tolerability. In addition dosage has to be adjusted in case of haemofiltration or haemodialysis. At last future options for high dose fluconazole are discussed.

journal_name

Mycoses

journal_title

Mycoses

authors

Silling G

doi

10.1111/j.1439-0507.2002.tb04768.x

subject

Has Abstract

pub_date

2002-01-01 00:00:00

pages

39-41

eissn

0933-7407

issn

1439-0507

journal_volume

45 Suppl 3

pub_type

杂志文章,评审

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