Issue Date: June 23, 2026
Issued by: Center for Veterinary Medicine
Topic(s): Anthelmintics, Target Animal – Effectiveness, VICH
Status: Final
CVM GFI #113 (VICH GL20) Effectiveness of Anthelmintics: Specific Recommendations for Felines
The present guidance for felines was developed by the Working Group established by the International Cooperation on Harmonisation of Technical Requirements for Registration of Veterinary Medicinal Products (VICH), Anthelmintic Guidances, and subsequently revised in 2024. It should be read in conjunction with Guidance for Industry (GFI) #90 (VICH GL7), “Effectiveness of Anthelmintics: General Recommendations,” which should be referred to for discussion of broad aspects for providing pivotal data to demonstrate product anthelmintic effectiveness. The present document is structured similarly to GFI #90/VICH GL7 with the aim of simplicity for readers comparing both documents.The aim of this feline guidance is: (1) to be more specific for certain specific feline issues not discussed in GFI #90/VICH GL7; (2) to highlight differences with VICH GL7 on effectiveness data recommendations; and (3) to give explanations for disparities with GFI #90/VICH GL7.It is also important to note that technical procedures to be followed in the studies are not the aim of this guidance. We recommend that sponsors refer to the pertinent procedures described in detail in other published documents, e.g., World Association for the Advancement of Veterinary Parasitology (WAAVP): second edition of guidelines for evaluating the efficacy of anthelmintics for dogs and cats. Veterinary Parasitology 312: 109815, 2022, and updated versions as they are published.
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