Critical Clarification: Mycamine is NOT Itraconazole
Mycamine (micafungin) is an echinocandin antifungal, NOT itraconazole, and is FDA-approved ONLY for Candida infections—it has no established efficacy against extensive systemic fungal infections caused by other fungi. 1
What Mycamine Actually Treats
Mycamine is indicated exclusively for:
- Candidemia and acute disseminated candidiasis
- Candida peritonitis and abscesses
- Esophageal candidiasis
- Prophylaxis of Candida infections in HSCT recipients
Critical Limitation: Mycamine has NOT been adequately studied for endocarditis, osteomyelitis, or meningoencephalitis due to Candida, and the efficacy against fungi other than Candida has NOT been established. 1
Dosing for Candida Infections (What Mycamine Actually Does)
Adults
- Candidemia/Disseminated Candidiasis: 100 mg IV once daily (mean duration 15 days, range 10-47 days) 1
- Esophageal Candidiasis: 150 mg IV once daily (mean duration 15 days, range 10-30 days) 1
Pediatric Patients ≥4 Months
- Candidemia/Disseminated Candidiasis:
- ≤30 kg: 2 mg/kg once daily (max 100 mg)
30 kg: 2 mg/kg once daily (max 100 mg) 1
Infants <4 Months
- Candidemia WITHOUT meningoencephalitis/ocular dissemination: 4 mg/kg once daily
- NOT established for CNS/ocular involvement (higher doses may be needed) 1
Administration
- Reconstitute with 5 mL of 0.9% NaCl or 5% dextrose
- Dilute in 100 mL for adults
- Do NOT mix or co-infuse with other medications (precipitates with many drugs)
- Protect from light during storage (not necessary to cover tubing during infusion)
- Stable for 24 hours at room temperature after reconstitution 1
For Extensive Non-Candida Fungal Infections: Use Itraconazole Instead
If you're asking about extensive systemic mycoses (blastomycosis, histoplasmosis, sporotrichosis, coccidioidomycosis), itraconazole is the appropriate oral azole:
Itraconazole Dosing for Endemic Mycoses
- Loading dose: 200 mg three times daily for 3 days 2, 3, 4
- Maintenance: 200 mg once or twice daily depending on severity 2, 3, 4
- Duration: 6-12 months for most infections; ≥12 months for osteoarticular/severe disease 2, 3
Critical Monitoring for Itraconazole
Therapeutic drug monitoring is essential: Check serum levels after 2 weeks of therapy to ensure adequate absorption. Target trough concentration ≥1.0 mg/mL (sum of itraconazole + hydroxy-itraconazole metabolite). 2, 4, 5 Levels <0.5 mg/mL are associated with treatment failure, while levels >10 mg/mL increase toxicity risk without added benefit. 4, 5
Severe/Life-Threatening Infections Require Amphotericin B First
For moderately severe to severe disease, initiate with lipid formulation amphotericin B 3-5 mg/kg/day (or amphotericin B deoxycholate 0.7-1 mg/kg/day) for 1-2 weeks until clinical improvement, then transition to itraconazole. 2, 3
Common Pitfall
Do not confuse Mycamine (micafungin/echinocandin) with azoles like itraconazole. They have completely different spectrums of activity and clinical indications. Mycamine will not work for mold infections, endemic mycoses, or most non-Candida yeasts.