Emily Statham

Emily Statham is an associate in the firm’s Washington, DC office, where she is a member of the Food, Drug, and Device and Life Sciences Transactions Practice Groups. She advises pharmaceutical, biotechnology, and medical device companies on a variety of regulatory, compliance, and transactional issues.

June 27, 2024, Covington Alert

On June 25, 2024, the Food and Drug Administration’s (FDA) Center for Veterinary Medicine (CVM) announced that it has finalized Guidance for Industry (GFI) #276, Effectiveness of Anthelmintics: Specific Recommendations for Products Proposed for the Prevention of Heartworm Disease in Dogs (Final Guidance). The Final Guidance replaces CVM’s draft guidance issued in November 2022. While CVM’s core recommendations remain the same, the Final Guidance clarifies the discussion and recommendations related to geographic locations from which Dirofilaria immitis (D. immitis) larvae used in trials should be sourced, laboratory dose confirmation studies, and field effectiveness studies for products intended to prevent heartworm disease. CVM’s stated overarching goal in making the revisions is to better align GFI #276 with current technology and veterinary epidemiology, including available diagnostic methodology. Drug sponsors who deviate from these recommendations are encouraged to discuss the deviations with CVM.


On May 24, 2018, FDA published a Federal Register Notice requesting public input on possible alternative approaches for evaluating the effectiveness of heartworm disease prevention products for dogs. On its webpage announcing the final guidance, FDA explained that it asked for public input because of reports of lack of effectiveness and certain limitations of the effectiveness studies conducted to support product approval. FDA’s then-current recommendation for demonstrating the effectiveness of a new animal drug intended to prevent heartworm disease was for sponsors to conduct two laboratory dose confirmation studies and one multi-site field effectiveness study under the principles of Good Clinical Practice. FDA specifically requested input on the population level effectiveness endpoint, exposure to infective D. immitis larvae in field studies, outcome assessment in field studies, and laboratory study designs.Continue Reading FDA Issues Final Guidance on Demonstrating Effectiveness of Anthelmintics in Dogs