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Information about Flucytosine

Flucytosine is an antifungal agent used to treat severe infections caused by candida and cryptococcus.

Liver safety of Flucytosine

Flucytosine therapy can cause transient mild-to-moderate serum aminotransferase elevations and has been mentioned as a very rare cause of clinically apparent acute drug induced liver injury.

Mechanism of action of Flucytosine

Flucytosine (floo sye' toe zeen) is a fluorinated pyrimidine analogue which has potent fungicidal activity. Flucytosine is taken up by fungal cells and converted to fluorouracil, which blocks pyrimidine metabolism and may be converted to metabolites that block DNA synthesis. Human cells do not possess the enzymes to convert flucytosine to these toxic metabolites. Flucytosine is active against several Candidal and Cryptococcal species.

FDA approval information for Flucytosine

Flucytosine was approved for use in the United States in 1971, but has been largely replaced by better tolerated and more potent antifungal agents such as amphotericin and the azoles.

Dosage and administration for Flucytosine

Flucytosine is available as tablets of 250 and 500 mg in generic forms and under the brand name of Ancobon. The usual recommended dose is 50 to 150 mg/kg daily in divided doses (usually every six hours) and it is usually used in combination with other antifungal agents, most often amphotericin B.

Side effects of Flucytosine

Common side effects include nausea, vomiting, and headache. Rare but severe side effects include bone marrow suppression, renal failure, cardiac arrest and toxic epidermal necrolysis.

The following drugs are antifungal agents:

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