Vetsulin® (porcine insulin zinc suspension) is the only FDA-approved insulin for use in diabetic dogs and cats in the United States. Vetsulin (porcine insulin zinc suspension) is an injectable insulin suspension that reduces hyperglycemia (high blood sugar) in dogs and cats with diabetes mellitus. Vetsulin is an animal-derived insulin, so it is designed to work specifically for dogs and cats. It has a rapid onset, and is long-lasting. It's also one of the most reasonably-priced insulins available for pets. Although Vetsulin is not a cure for diabetes mellitus, it can help control or eliminate many of the clinical signs associated with diabetes and reduce the chance of developing complications, including life-threatening diabetic ketoacidosis, a condition where the body uses fatty acids as a substitute energy source for glucose. Vetsulin is supplied as a sterile injectable suspension in multidose vials containing 10 mL of 40 IU/mL porcine insulin zinc suspension. Cartridges are supplied in cartons of 10, 2.7 mL cartridges and are for use with VetPen®. Vetsulin should not be used in dogs or cats known to have a systemic allergy to pork or pork products. Vetsulin is contraindicated during periods of hypoglycemia. Keep out of reach of children. As with all insulin products, careful patient monitoring for hypoglycemia and hyperglycemia is essential to attain and maintain adequate glycemic control and prevent associated complications. Over dosage can result in profound hypoglycemia and death. The safety and effectiveness of Vetsulin in puppies and kittens, breeding, pregnant, and lactating dogs and cats has not been evaluated. See package insert for full information regarding contraindications, warnings, and precautions.