The Ulcergard Oral Paste is delivered in a syringe form that is administered to horses every day. The active ingredient in UlcerGard, omeprazole, works to suppress the stomach acids that cause ulcers in horses also prevents equine gastric ulcer syndrome, which can be a painful condition. Equine ulcers can occur if your horse tends to become stressed easily or is prone to stomach acid problems. UlcerGuard comes in a cinnamon-flavored paste for easy ingestion.