Cited by 93Antifungal resistance and susceptibilityAntibiotics Pharmacokinetics and EfficacyPharmacogenetics and Drug Metabolism

Pharmacokinetics of 18F-labeled fluconazole in healthy human subjects by positron emission tomography

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Fischman, A J, Alpert, N M, Livni, E, Ray, S, Sinclair, I, Callahan, R J, Correia, J A, Webb, D +2 more·1993·Antimicrobial Agents and Chemotherapy

Abstract

The distribution of fluconazole in tissue of human volunteers was determined by positron emission tomographic scanning over a 2-h period following the infusion of a tracer dose of 18F-fluconazole (5 to 7 mCi) plus 400 mg of unlabeled drug (the standard daily dose of fluconazole). Previous studies have validated this approach for animals. From serial positron emission tomographic imaging and blood sampling, pharmacokinetics of fluconazole in tissue were determined. There was significant distribution of the radiolabeled drug in all organs studied, with nearly constant levels achieved by 1 h. Plateau concentrations of fluconazole in key organs (micrograms per gram) included the following: whole brain, 4.92 +/- 0.17; heart, 6.98 +/- 0.20; lung, 7.81 +/- 0.46; liver, 12.94 +/- 0.24; spleen, 22.96 +/- 2.5; kidney, 11.23 +/- 0.61; prostate, 8.24 +/- 0.58; and blood, 3.76 +/- 0.30. Since levels of fluconazole of > 6 micrograms/g are needed to treat infection with most strains of Candida and levels of > 10 micrograms/g are needed for Cryptococcus neoformans, Coccidioides immitis, and Histoplasma capsulatum, the following predictions can be made. The current standard dose of 400 mg/day should be more than adequate in the treatment of urinary tract and hepatosplenic candidiasis but problematic in the treatment of candidal osteomyelitis, even with the higher levels that develop after multiple doses. Similarly, higher doses should be considered, particularly in immunocompromised patients, with infection with C. neoformans, H. capsulatum, and C. immitis that involves the central nervous and musculoskeletal systems.

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Crossref · 10.1128/aac.37.6.1270

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Authors
Fischman, A. J., Alpert, N. M., Livni, E., Ray, S., Sinclair, I., Callahan, R. J., Correia, J. A., Webb, D., Strauss, H. W., & Rubin, R. H.
Affiliations
  • Massachusetts General Hospital (US)
  • Department of Radiology, Massachusetts General Hospital, Boston 02114.
Venue
Antimicrobial Agents and Chemotherapy
Published
1993-06
Volume
37
Issue
6
Pages
1270-1277
ISSN
  • 0066-4804 (ISSN-L)
  • 1098-6596
OpenAlex
W2076134038
Cited by
93
References
32
Citations by year
2024: 3 · 2023: 1 · 2022: 1 · 2021: 6 · 2020: 1 · 2019: 4 · 2018: 5 · 2017: 3 · 2015: 1 · 2014: 2 · 2013: 2 · 2012: 2
FWCI
3.40
Type
journal article
Language
en
Open access
Locations
  • Antimicrobial Agents and Chemotherapy (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Pfizer
Topics
  • Health Sciences › Medicine › Infectious Diseases › Antifungal resistance and susceptibility
  • Health Sciences › Medicine › Pharmacology › Antibiotics Pharmacokinetics and Efficacy
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Pharmacogenetics and Drug Metabolism
Keywords
fluconazole, pharmacokinetics, tissue distribution, radiolabeled drug, antifungal agents, Candida, Cryptococcus neoformans, Coccidioides immitis, Histoplasma capsulatum, candidiasis, dose optimization, immunocompromised patients, positron emission tomography
MeSH terms
Adult, Brain, Fluorine Radioisotopes, Humans, Male, Tissue Distribution, Tomography, Emission-Computed, Fluconazole

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