Itraconazole Dosage and Administration Guidelines
Dosage by Infection Type
- For cutaneous and lymphocutaneous infections, the recommended dosage is 200 mg orally daily for 2-4 weeks after all lesions have resolved, typically for a total of 3-6 months, as recommended by the Infectious Diseases Society of America 1, 2
- For osteoarticular infections, the recommended dosage is 200 mg orally twice daily for at least 12 months, with initial therapy with amphotericin B (lipid formulation 3-5 mg/kg daily) followed by itraconazole 200 mg twice daily to complete 12 months of therapy, as recommended by the Infectious Diseases Society of America 1, 5
- For pulmonary infections, the recommended dosage is 200 mg orally twice daily for at least 12 months, with initial amphotericin B followed by itraconazole 200 mg twice daily to complete 12 months, as recommended by the Infectious Diseases Society of America 1
- For onychomycosis, the recommended dosage is 400 mg daily for 1 week per month, repeated for 2-4 months, as recommended by the British Association of Dermatologists 6
Administration Guidelines
- Itraconazole capsules should be taken with food to enhance absorption, as recommended by the Infectious Diseases Society of America 2
- Itraconazole solution is better absorbed when taken on an empty stomach, as recommended by the Infectious Diseases Society of America 2
- For doses >200 mg/day, administer in two divided doses, as recommended by the Infectious Diseases Society of America 2
- For some regimens, a loading dose is recommended: 200 mg three times daily for 3 days, as recommended by the Infectious Diseases Society of America 2
Special Considerations
- For immunocompromised patients, lifelong suppressive therapy with itraconazole 200 mg daily may be required, as recommended by the Infectious Diseases Society of America 4
- Pregnant women should avoid itraconazole due to potential teratogenic effects, as recommended by the Infectious Diseases Society of America 4
- For children, dosages of 6-10 mg/kg daily (maximum 400 mg daily) have been used, as recommended by the Infectious Diseases Society of America 4
Treatment Outcomes and Monitoring
- Success rates of 90-100% have been reported for cutaneous and lymphocutaneous infections, with a strength of evidence rated as high, as reported by the Infectious Diseases Society of America 2, 3
- Clinical improvement is often seen within 4 weeks of starting therapy, as reported by the Infectious Diseases Society of America 3