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Comparison of Compounded, Generic, and Innovator-Formulated Itraconazole in Dogs and Cats

Comparison of Compounded, Generic, and Innovator-Formulated Itraconazole in Dogs and Cats

Janelle Renschler, Amanda Albers, Hanna Sinclair-Mackling, Lawrence Joseph Wheat

J Am Anim Hosp Assoc. Jul/Aug 2018;54(4):195-200.

PMID: 29757665

Abstract:

The triazole antifungal itraconazole may be cost prohibitive in brand name form; therefore, compounded and generic products are often used as alternatives. Itraconazole blood concentrations have not been studied in clinical patients receiving these formulations. Itraconazole bioassay was performed on serum/plasma from 95 dogs and 20 cats receiving itraconazole (compounded from bulk powder, generic pelletized, or brand name) for systemic mycosis treatment. Mean itraconazole concentration was lower in the compounded group (n = 42) as compared with the generic (n = 40) or brand name (n = 33) groups (0.5 µg/mL versus 8.3 µg/mL and 6.5 µg/mL, respectively; P < .001). No statistical difference was observed between itraconazole concentrations in the generic and brand name groups. Forty animals (95.2%) in the compounded group had subtherapeutic (<1.0 µg/mL) values. All cats in this group (n = 10) had undetectable itraconazole concentrations. Some animals in the generic and brand name groups had subtherapeutic values (12.5 and 12.1%, respectively) or potentially toxic values (>10 µg/mL; 37.5 and 24%, respectively). Compounded itraconazole should be avoided, but generic itraconazole appears to serve as a reasonable alternative to brand name itraconazole. Therapeutic drug monitoring may be beneficial in all cases.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP84625616-B	Itraconazole		84625-61-6	Price

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