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Judge Limits Lawsuit Alleging Elanco Monopolized Pet Medication Market

By  |  October 8, 2025

A federal judge in Indiana has pared back a consumer lawsuit accusing animal health company Elanco Animal Health Inc. of monopolizing the market for certain flea and tick treatments, according to Reuters. The case, which centers on allegations that the company’s business practices led to inflated prices for its Advantix line of products, will continue under state antitrust laws despite the dismissal of federal claims.

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    U.S. District Judge James Hanlon ruled Wednesday that the plaintiff, a Kansas resident, had not sufficiently demonstrated that Elanco conspired with pet specialty retailers to fix prices or stifle competition, per Reuters. As a result, Hanlon dismissed the federal antitrust allegations but allowed the lawsuit to proceed under the laws of 29 states and the District of Columbia.

    The lawsuit, filed in 2024, contends that Elanco pressured retailers to avoid selling generic versions of topical flea and tick treatments containing the insecticide imidacloprid. According to Reuters, the complaint alleged that such practices limited consumer choice and forced pet owners to pay higher prices for brand-name products. Elanco has denied any wrongdoing, and both the company and the plaintiff’s legal team did not immediately respond to requests for comment.

    Related: Bayer Faces Antitrust Battle in California Over Pet Care Market Practices

    Judge Hanlon noted that it was too early to determine whether the plaintiff could legally represent consumers from other states. The case, Tracy Spradlin v. Elanco Animal Health Inc., is being heard in the U.S. District Court for the Southern District of Indiana.

    Elanco previously acquired Bayer’s animal health division for $7.6 billion in 2020. The consumer lawsuit mirrors similar claims filed against Bayer by startup Tevra Brands, which accused the company of hindering competition in the retail market for flea and tick treatments. Bayer ultimately prevailed in that case at trial in California, according to Reuters.

    Source: Reuters