Phenylbute Powder is a non-steroidal, anti-inflammatory drug which is useful when it comes to helping reduce inflammation and pain in your horse's muscles, bones, and joints. It is an edible powder which can be applied to your horse's regular grain feed. It features a delicious orange citrus flavor, which entices your horse to consume it. So, this powder is helpful when treating lameness in horses. You will need a valid prescription from your veterinarian in order to purchase this product.