Whatley Kallas is investigating practices by Bayer, the manufacturer of Advantix- and Advantage-branded flea medications for pets, that have allowed Bayer to maintain a monopoly position over the market for veterinary topical flea medications. These practices, and Bayer’s resulting monopoly power, have caused consumers to pay at least tens of millions of dollars more for topical flea medications than they would have paid in a competitive market. If you have purchased Advantix- or Advantage-branded flea medications online or at a retail store since 2018, you may have an antitrust claim against Bayer for its monopolistic practices. Whatley Kallas attorneys are available to discuss the options and potential remedies available to you.