U-40 Syringes are the preferred choice for insulin administration for ease-of-use and your pet's comfort. For veterinary use only with ProZinc Insulin. U-40 Syringes require a prescription from your veterinarian if you reside in Connecticut, Delaware, New Hampshire, New Jersey, Oklahoma, Florida (Broward and Dade counties) or New York.
ProZinc is insulin combined with zinc and protamine which helps to prolong the release of the insulin into your cat's and dog's body. ProZinc requires a prescription from your veterinarian. U-40 Syringes are sold separately. ProZinc Cat and Dog Insulin requires refrigeration and must be kept at refrigerator temperatures at all times.