ITRAFUNGOL™ (itraconazole oral solution) for Cats

ITRAFUNGOL™ (itraconazole oral solution) for Cats

  • Cat

Dermatophytosis incidence

  • Approximately 1.3 million cats are treated annually3
  • While any cat can be affected, young, weak or immunosuppressed animals are more susceptible1
  • Cats can be exposed to infective spores via contact with carrier cats, contaminated blankets, bedding, toys, brushes and fleas


itrafungol_site_ClinicalSign_box.jpgClinical Signs

  • Hair loss (alopecia) appearing in single or multiple circular or irregular patches1,7
  • Scaling/crusting and erythema1,7
  • Broken hair1,7
  • Lesions occurring mainly on the head, ears, tail and front paws1,2


Zoonotic Potential

  • About 50% of humans exposed to infected cats acquire an infection, even if the cats are not showing signs of infection5
  • Spores in the environment can remain infectious for up to 18 months5




Rapid confirmation of infection is necessary to begin treatment and limit spread to other animals and people. Common diagnostic methods include:6

  • Wood’s ultraviolet lamp: Shows green fluorescence from Microsporum canis-infected hair shafts. Active infection in the follicular unit produces a chemical that fluoresces. In early infections, the proximal hair shaft fluoresces. In established infections, the entire hair shaft might glow. After treatment, there may be persistent presence of “glowing tips” as the hair grows out
  • Examination of hairs and scales: Microscopic examination of hair plucked from the periphery of lesions, and scrapings from alopecic areas for hyphae and/or spores. Hairs and scales are mounted (e.g., in mineral oil) for microscopic examination
  • Culture: Brush suspect lesions and the coat using 20 brush strokes (or brushing for 2 to 3 minutes) with a soft-bristle toothbrush. Inoculate the toothbrush into a dermatophyte culture medium. M. canis infection changes the medium color (yellow to red). The resulting colonies can be microscopically examined for speciation. A positive culture does not always indicate an active infection; a scoring system is used to determine a pathogen score (P-score)




itrafungol_site_Vet-Cat_100px_2b.jpgProven Efficacy11

80 cats infected with Microsporum canis were treated with either placebo or ITRAFUNGOL, (5 mg/kg/day) over alternate weeks for three treatments, followed by a 4-week follow-up period. No topical therapy was used.

In the group treated with Itrafungol:

  • Clinical improvement was seen within 7 days of starting treatment
  • Clinical cure occured well in advance of mycological cure
  • 90% had at least 1 negative fungal culture by the end of the study
  • 98% had complete resolution of all clinical lesions, compared to 15% of untreated cats by the end of the study
  • Time to mycological cure was significantly shorter (P = 0.0003) for cats in the treated group versus control





  • Daily ITRAFUNGOL dose is 5 mg/kg (0.5 mL/kg) on alternating weeks for three treatment cycles
  • Itraconazole accumulates in hair and skin, giving residual antifungal activity between doses and after the last dose8
  • Residual concentrations in hair and skin remain above therapeutic levels during non-treatment weeks11


FDA is aware of significant variations in drug absorption of oral formulations of itraconazole compounded by different pharmacies.

FDA recommends that veterinarians prescribe FDA-approved Itrafungol for cats10


  • FDA-approved drugs have data demonstrating that the drugs are safe, effective and properly manufactured so they have the intended quality and effect
  • The labeling for ITRAFUNGOL is written specifically for cats and includes all necessary information, including associated risks, so you can use the drug safely and effectively in cats


Safety Information:

Do not administer to cats with hypersensitivity to itraconazole. ITRAFUNGOL has not been shown to be safe in pregnant cats and should only be used in pregnant or lactating cats when the benefits outweigh the potential risks. Not for use in humans. Keep this and all medications out of reach of children. Wash hands and exposed skin after use. Use with caution in cats with renal dysfunction or impaired liver function. If clinical signs suggestive of liver dysfunction develop, treatment should be discontinued. ITRAFUNGOL is a cytochrome p-450 inhibitor and may increase or prolong plasma concentrations of other drugs metabolized by this pathway. Cats suffering from heart disease should be carefully monitored during treatment. The most common adverse reactions reported in clinical trials include vomiting, diarrhea, decreased appetite and elevated hepatic enzymes. Please click here for full prescribing information.


1. Moriello KA, DeBoer DJ. Cutaneous Fungal Infections. Infectious Diseases of the Dog and Cat. 4th edition: 2012;588-602.
2. Chermette, R., Ferreiro, L. & Guillot, J. Mycopathologia 2008 166: 385.
3. Virbac Animal Health, Data on file.
4. Moriello, K. Feline Dermatophytosis: Aspects Pertinent to Disease Management in Single and Multiple Cat Situations. J Fel MedS urg. 16: 2014;419-431
5. Miller WH, Griffin CE, Campbell KL, eds. Fungal and algal skin disease. In: Muller & Kirk’s Small Animal Dermatology, 7th ed. 2013;223-283.
6. Moriello, K., Coyner, K. et. al. Diagnosis and Treatment of Dermatophytosis in Dogs and Cats: Clinical Consensus Guidelines of the World Association for Veterinary Dermatology.Vet Dermatol. 28.3: 2017;266-e68.
7. Ghannoum, M. and Rice, L. Antifungal Agents: Mode of Action, Mechanisms of Resistance, and Correlation of These Mechanis ms wtih Bacterial Resistance. Clin Microbiol Rev. 12.4: 1999;501-517.
8. Virbac Animal Health. Data on file.
9. Puls C, Johnson A, et al. “Efficacy of oral itraconazole oral solution using an alternatingweek pulse therapy regimen for treatment of cats with experimental Microsporum canis infection.” Journal of Feline Medicine and Surgery 2018, Vol. 20(10) 869-874
10. Itrafungol (itraconazole oral solution) - Veterinarians. FDA Approves Itrafungol, a New Animal Drug for Treating Ringworm in Cats. information/itrafungol-itraconazole-oralsolutionveterinarians. itrafungol-itraconazole-oral-solution-veterinarians. Accessed September 5, 2019.
11. Product Insert


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