Uniprim Powder, Apple Flavor - Trimethoprim 67 mg/gram and sulfadiazine 333 mg/gram.Trimethoprim sulfadiazine is well tolerated by foals. For the reason that prescription items need to match your veterinarians instructions, they arent available to add directly to your cartwe just want to make sure everything is exactly right for you and your horse. Rather than "Add to Cart" you will simply add your items to an Order Request, enter your information, and click submit. Well take it from there and send you an invoice by email so you can