Merial keeps animals merry. It makes a variety of drugs and vaccines that treat and prevent disease in pets, livestock, and wildlife. Used by veterinarians, farmers, and pet owners in some 150 countries, the company's lead products include Ivomec and Eprinex, anti-parasitics for livestock; Frontline flea and tick treatments for cats and dogs; and heartworm prevention drug Heartgard. Merial focuses on four treatment areas: anti-infectious drugs, pain medicines, parasiticides, and vaccines. The firm sells its OTC products wherever pet supplies are sold and its prescription medications through veterinarians. Sanofi is selling Merial to Boehringer Inghelheim in exchange for that firm's OTC products business.