This is a completely pure USP Grade Aspirin designed specifically for horses of all kinds and species. It provides quick relief from joint pains, minor muscle aches, inflammations, and fever. Its' quick healing properties make this a preferred medicinal product among many horse owners. You can easily use the AniMed AniPrin P as a normal feed ration or as a top dress. Each ounce of this medicinal formula contains pure acetylsalicylic acid.