United States: In the United States, the sale of flea and worm treatments is regulated by the Environmental Protection Agency (EPA). You may need a license or permit from the EPA to sell these products, depending on the specific products you are selling and your state's regulations.
European Union: In the European Union, the sale of flea and worm treatments is regulated by the European Medicines Agency (EMA). You may need a license or authorization from the EMA to sell these products, depending on the specific products you are selling and your country's regulations.
Other Countries: The laws and regulations regarding the sale of flea and worm treatments vary from country to country. It is important to research the specific requirements in your jurisdiction to ensure compliance.