Prescription items are NON-RETURNABLE and NON REFUNDABLE *** CURRENT EXPIRATION DATE 11/20. *** This prescribed medication is shipped in a cooler with ice packs. Please note the ice packs may be melted by the time you receive your package, but they have done the job of protecting the medications during the shipment. Medications and time-sensitive items will be shipped Monday through Wednesday before 2:00 pm Eastern Time via 2-day service. If next day service is required please advise customer service and will have an extra charge. If the order was received after 2:00 pm Eastern Time on Thursday the order will ship out on Monday. ProZinc Insulin ProZinc Insulin, a protamine zinc insulin, was created specifically with cats in mind. Protamine zinc insulin formulations have a typical duration of effect in the cat of 10-14 hours. ProZinc works quickly and effectively to regulate blood glucose levels. Benefits: ProZinc Insulin, a protamine zinc insulin, was created specifically with cats in mind. Protamine zinc insulin formulations have a typical duration of effect in the cat of 10-14 hours. ProZinc works quickly and effectively to regulate blood glucose levels. ProZinc insulin releases slowly over time to help maintain a stable, consistent blood glucose level throughout the day. For use: Cats only Strength/Size: U-40 Active ingredient(s): protamine zinc recombinant human insulin Cautions: This medication does not have an FDA approved indication for use in animals, but it is a common and acceptable practice for veterinarians to prescribe this human medication for use in animals. Do not use on Dogs. Inform your veterinarian prior to use of this medication if your pet has low blood sugar (hypoglycemia). Do not switch from one type insulin to another unless under the direction 012PRO-10 12313449919