Vetrin, with aspirin as the active ingredient, relieves pain and reduces inflammation in dogs. Chewable roast beef-flavored tablets are for canine use only. Safe and effective for chronic conditions such as arthritis and hip dysplasia. Use for the treatment of injuries, muscle strain, or following surgery to treat pain and stiffness. Use 100 mg tablets for small to medium breeds, 325 mg for large to giant breeds. Vetrin Chewable Canine Asprin contains 100 tablets.