Fluconazole Dosing Guidelines for Fungal Infections

Introduction to Fluconazole Treatment

The Infectious Diseases Society of America recommends a standard dose of 400 mg (6 mg/kg) daily for systemic candidiasis, with a loading dose of 800 mg (12 mg/kg) on day 1 4
The American Society of Health-System Pharmacists suggests that fluconazole has no activity against Candida krusei, and variable activity against C. glabrata—confirm susceptibility before use 1, 6

For oropharyngeal candidiasis, the Centers for Disease Control and Prevention recommend a loading dose of 200 mg on day 1, and maintenance of 100 mg once daily for 7-14 days 1, 2
For esophageal candidiasis, the Infectious Diseases Society of America recommends treatment for a minimum of 14-21 days and at least 2 weeks after symptom resolution 3, 1
For urinary tract infections, the European Society of Clinical Microbiology and Infectious Diseases suggests 200 mg (3 mg/kg) daily for 14 days for symptomatic cystitis 3, 5, 1
For CNS candidiasis, the American Academy of Neurology recommends 400-800 mg (6-12 mg/kg) daily for patients unable to tolerate amphotericin B 3, 5

The Pediatric Infectious Diseases Society recommends that pediatric dosing be based on a conversion of 3 mg/kg ≈ 100 mg adult dose 2
The Society of Critical Care Medicine suggests that central venous catheter removal is strongly recommended for patients with systemic candidiasis 2
For chronic disseminated candidiasis, the Infectious Diseases Society of America recommends 400 mg (6 mg/kg) daily for stable patients, continuing until lesions resolve (typically 3-6 months) 3, 6, 5

The Clinical and Laboratory Standards Institute recommends that fluconazole-resistant species be treated with alternative antifungals (echinocandins, amphotericin B, voriconazole) 6, 2
The Infectious Diseases Society of America suggests that inadequate treatment duration leads to relapse—continue until clinical and laboratory parameters indicate resolution 3