ProZinc (protamine zinc recombinant human insulin) U-40 Injectable for Dogs & Cats, 10-mL
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About This Item
Details
ProZinc is a protamine zinc insulin prescribed by veterinarians to help support the insulin levels of diabetic cats and dogs. A single ProZinc injection has an appropriate duration of activity (10-14 hours) in cats and an extended duration of activity (16-24 hours) in dogs, which helps to keep their blood glucose level consistent throughout the day. It contains recombinant DNA that mimics human insulin, so it helps to control your pet's diabetic symptoms and keeps them comfortable.We directly source prescription medications from manufacturers and wholesale distributors registered with the FDA and licensed by applicable state boards. Guaranteed genuine, and where applicable, backed by the manufacturer.
Ingredients
Insulin, Protamine Sulfate, Zinc Oxide, Glycerin, Dibasic Sodium Phosphate, Heptahydrate Phenol (added as a preservative), Hydrochloric Acid. Water for Injection (maximum).
Instructions
USE OF A SYRINGE OTHER THAN A U-40 SYRINGE WILL RESULT IN INCORRECT DOSING. FOR SUBCUTANEOUS INJECTION ONLY. DO NOT SHAKE OR AGITATE THE VIAL. PROZINC (protamine zinc recombinant human insulin) should be mixed by gently rolling the vial prior to withdrawing each dose from the vial. Once mixed, PROZINC suspension has a white, cloudy appearance. Clumps or visible white particles can form in insulin suspensions: do not use the product if clumps or visible white particles persist after gently rolling the vial. Using a U-40 insulin syringe, the injection should be administered subcutaneously on the back of the neck or on the side of the cat or dog. FOR CATS: The initial recommended PROZINC dose is 0.1 - 0.3 IU insulin/pound of body weight (0.2 - 0.7 IU/kg) every 12 hours. The dose should be given concurrently with or right after a meal. The veterinarian should re-evaluate the cat at appropriate intervals and adjust the dose based on both clinical signs and glucose nadirs until adequate glycemic control has been attained. In the effectiveness field study, glycemic control was considered adequate if the glucose nadir from a 9-hour blood glucose curve was between 80 and 150 mg/dL and clinical signs of hyperglycemia such as polyuria, polydipsia, and weight loss were improved. Further adjustments in the dosage may be necessary with changes in the cats diet, body weight, or concomitant medication, or if the cat develops concurrent infection, inflammation, neoplasia, or an additional endocrine or other medical disorder. FOR DOGS: Starting dose: The recommended starting dose for PROZINC is 0.2-0.5 IU insulin/pound of body weight (0.5- 1.0 IU/kg) once daily. The recommended starting dose for naïve dogs is the lower end of the dose range. The recommended starting dose for dogs with poorly controlled diabetes mellitus and transitioning from another insulin product is the mid to higher end of the dose range based on the veterinarians experience with the dogs medical history and previous insulin dose. When transitioning from another insulin, the dogs blood glucose and general condition should be closely monitored. When transitioning from another insulin, PROZINC should be started once daily, regardless of the frequency of prior insulin use. The dose should be given concurrently with or right after a meal. The veterinarian should reevaluate the dog at appropriate intervals and adjust the dose and frequency based on both clinical signs and laboratory test results (the blood glucose curve values and shape, nadir, and fructosamine) until adequate glycemic control has been attained. In the effectiveness field study, glycemic control was considered adequate if the glucose nadir from a 9-hour blood glucose curve was between 80 and 125 mg/dL, the maximum blood glucose was < 300 mg/dL, and clinical signs of hyperglycemia such as polyuria, polydipsia, or weight loss were improved. Changing to twice daily dosing: Twice daily dosing should be considered if the duration of insulin action is determined to be inadequate with once daily dosing. Use caution when adjusting from once daily to twice daily dosing because PROZINC may have prolonged duration of action in some dogs (see Clinical Pharmacology). The veterinarian should closely monitor the duration of action using blood glucose curves to avoid the increased risk of hypoglycemia. If twice daily dosing is initiated, the two doses should each be approximately 25% less than the once daily dose required to attain an acceptable glucose nadir. For example, if a dog receiving 10 units of PROZINC once daily has an acceptable nadir but inadequate duration of activity, the dose should be changed to 7 units twice daily (round down to the nearest whole unit). Further adjustments in the dosage may be necessary with changes in the dogs diet, body weight, or concomitant medication, or if the dog develops concurrent infection, inflammation, neoplasia, or an additional endocrine or other medical disorder.
Store in an upright position under refrigeration at 36-46 F (2-8 C). Do not freeze. Protect from light. Use the 10 mL vial within 60 days of first puncture. Use the 20 mL vial within 80 days of first puncture.
FAQ
PROZINC® is an injectable insulin for cats and dogs that is FDA approved to help control hyperglycemia (high blood glucose / high blood sugar) and the clinical signs associated with hyperglycemia in cats and dogs with diabetes mellitus.
Insulin helps regulate cellular metabolism by moving all-important glucose from the bloodstream into the cells. Cats and dogs with diabetes mellitus don’t produce enough of their own naturally produced insulin, or their own insulin doesn’t work properly. This causes glucose to persistently build up in the bloodstream, leading to health problems. PROZINC® becomes the essential replacement for diabetics to get their appropriate source of daily insulin.
With just two daily doses a day in cats and once-a-day dosing in most dogs, delivered with or just after a meal, PROZINC® provided fast, effective results for hyperglycemia in pets with diabetes.1,2
PROZINC® (protamine zinc recombinant human insulin) has been rigorously tested for safety in cats and dogs and has been approved by the FDA to be safe and effective for diabetes control (when used as prescribed).1,2 Please refer to full prescribing information.
As with the use of all insulin products, careful patient monitoring for low blood sugar (hypoglycemia) and high blood sugar (hyperglycemia), is essential to prevent possible associated complications. The most common insulin-related side effect is hypoglycemia. Signs of low blood sugar can occur suddenly and may include: weakness , staggering gait, muscle twitching , coma, depression, lethargy, sluggishness, behavioral changes, seizures, convulsions and death.
If your dog or cat is unconscious or having a seizure, this is a medical emergency. Take them to the veterinarian immediately. If your dog or cat is conscious, rub approximately 1 teaspoon of corn syrup or honey on your pet’s gums. When they are able to swallow, give corn syrup or honey by mouth until your pet is alert enough to eat. Feed the usual meal and contact your veterinarian.
PROZINC® should be given with or right after a meal and at about the same time each day. Before administration, mix PROZINC® by gently rolling the vial. Once mixed, PROZINC® has a white, cloudy appearance. After mixing, use a U-40 syringe to draw up the dose of insulin prescribed by your veterinarian. Administer the injection under the skin along the back of the neck or on the side of the dog or cat. Do not give your cat/dog its prescribed dose of PROZINC if it:
- Is experiencing an episode of low blood sugar (hypoglycemia). Common causes for low blood sugar include excessive doses of insulin, failure to eat, strenuous exercise, changes in the body’s need for insulin, diabetes-inducing disease or drug effects.
- Is not eating or is vomiting.
- Is sensitive to protamine zinc recombinant human insulin or any other ingredients in PROZINC.
- Do not give your cat/dog its prescribed dose of PROZINC if you see clumps or visible white particles in the vial after gently rolling
PROZINC® is the only FDA-approved recombinant human insulin for use in dogs and cats with diabetes. PROZINC® contains Protamine and Zinc in the formulation which helps promote optimal and consistent glycemic control.
PROZINC® is designed to be used with a U-40 syringe and using non U-40 syringes may result in incorrect dosing.
Consult your veterinarian prior to using PROZINC® in order to establish the insulin dosing needs of your pet. As per the product insert, it is recommended to initiate PROZINC® for dogs with a one-daily starting dose of 0.2-0.5 IU insulin/pound of body weight (0.5- 1.0 IU/kg). The recommended starting dose for naïve diabetic dogs is the lower end of the dose range. For Cats, it is recommended that PROZINC® be given twice per day with a recommended starting dose of 0.1 – 0.3 IU insulin/pound of body weight (0.2 – 0.7 IU/kg). Consult your vet prior to using PROZINC® to establish the dosing needs of your pet.
Contact your veterinarian immediately and, if your veterinarian is not available, seek other veterinary advice at once.
The safety and effectiveness of PROZINC® in breeding, pregnant, and lactating cats and dogs has not been evaluated. The safety and effectiveness of PROZINC® in puppies and kittens has not been evaluated.
PROZINC® has a two-year shelf life from the date of manufacture. Use the 10 mL vial within 60 days of first puncture. Use the 20 mL vial within 80 days of first puncture.
The vial of PROZINC® should be stored in an upright position under refrigeration at 36-46°F (2-8°C). Do not freeze. Protect from light.
PROZINC® is available in 20 mL and 10 mL multidose vials. Each mL of PROZINC® product contains 40 IU (international units) of protamine zinc recombinant human insulin.
PROZINC® can be given with other medications, but the dose may need to be adjusted due to the medication resulting in either increased or decreased insulin requirements. Tell your veterinarian about all medications you have given your pet in the past, and any medications that you are planning to give with PROZINC®. This should include medications that you can get for your pet without a prescription. Your veterinarian may want to ensure that all of your pet’s medications can be given together.
What do I do in case of accidental contact with eyes or accidental injection?
Avoid contact with eyes. In case of contact, immediately flush eyes with running water for at least 15 minutes. Accidental injection may cause hypoglycemia. In case of accidental injection, seek medical attention immediately. Exposure to product may induce a local or systemic allergic reaction in sensitized individuals.
Do not give your cat/dog its prescribed dose of PROZINC if it:
- Is experiencing an episode of low blood sugar (hypoglycemia). Common causes for low blood sugar include excessive doses of insulin, failure to eat, strenuous exercise, changes in the body’s need for insulin, diabetes-inducing disease or drug effects.
- Is not eating or is vomiting.
- Is sensitive to protamine zinc recombinant human insulin or any other ingredients in PROZINC.
- Do not give your cat/dog its prescribed dose of PROZINC if you see clumps or visible white particles in the vial after gently rolling
Refer to your veterinarian for general questions. For any specific product questions, please refer to the prescribing information or call Boehringer Ingelheim Animal Health’s customer service line number at 1-888-637-4251.

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Customers Mention
Ease of Use
Effectiveness
Ingredients
Long-Term Benefits
804 Customer Reviews
Easy process
This was my first time ordering this here and I must say I am impressed. It shipped immediately after our vet approved the prescription. It was sent by overnight
This was my first time ordering this here and I must say I am impressed. It shipped immediately after our vet approved the prescription. It was sent by overnight delivery and packed in a nice large insulated box for protection and the ice pack was still frozen and insulin was nice and cold. Expires two years from now. And much more reasonable in price here. Thank you!!!
Delivery Nightmare
We have never had an issue with delivery until now. Only one ice pack and it was NOT delivered overnight. Ice pack was melted by the time it got here. Insulin is
We have never had an issue with delivery until now. Only one ice pack and it was NOT delivered overnight. Ice pack was melted by the time it got here. Insulin is slightly cool, but by no means as cold as it is when refrigerated properly. Not only dissatisfied, but a little concerned for my cat using this medicine.
Shows great care for my cat's health!
The pharmacy tech called to tell me about a response given in error by my vet's office. I was able to get it corrected before it negatively affected my cat's health
The pharmacy tech called to tell me about a response given in error by my vet's office. I was able to get it corrected before it negatively affected my cat's health. Chewy's pharmacy is the best!
Customer care
Pharmacist reached out to my vet to get an emergency refill after chatting with them on the chat function. I'm really surprised at how good the follow through was
Pharmacist reached out to my vet to get an emergency refill after chatting with them on the chat function. I'm really surprised at how good the follow through was and how quickly it was done. Very appreciative. Thank you from me and my pet.
Price
Our cat Winston is on insulin and over-the-counter products will not work for him. It was very hard to fine this product I'm so thankful you carry it.
Our cat Winston is on insulin and over-the-counter products will not work for him. It was very hard to fine this product I'm so thankful you carry it.
Great experience with chewy
It’s been stressful managing my cat’s diabetes, and this drug has managed it very well. But my review is more so about Chewy and their service. They do such a great
It’s been stressful managing my cat’s diabetes, and this drug has managed it very well. But my review is more so about Chewy and their service. They do such a great job and are so reliable. Their customer service reps are always super helpful. Chewy has made it so easy. They contact the vet on your behalf and everything, I don’t even have to do anything. And the insulin vial comes packaged SO extremely carefully, with a ton of ice packs as well. And it arrives to me very quickly. Chewy is such a trustworthy company, love them!
Thanks for caring
I contacted Chewy regarding the passing of Mya. They, without asking, refunded me her most recent bottle of Prozinc 235.00. Then, a few days later, I received flowers
I contacted Chewy regarding the passing of Mya. They, without asking, refunded me her most recent bottle of Prozinc 235.00. Then, a few days later, I received flowers and a sympathy card. Thank You Chewy
FedEx driver bad
The driver basically threw the box on my front porch and it flipped on its side. If I didn't have FedEx notification and a Yi camera to see it was delivered around
The driver basically threw the box on my front porch and it flipped on its side. If I didn't have FedEx notification and a Yi camera to see it was delivered around 12:15 and went home to refrigerate it,it might not have still been cold at 5:00 when I normally get home because the vial was outside of the cold packs due to the box being flipped. I have a video of the driver if you want it
Poor delivery
Chewy needs to know that the person who delivered this order just tossed it on the ground. This is insulin, packaged in a glass bottle, surrounded with frozen packets
Chewy needs to know that the person who delivered this order just tossed it on the ground. This is insulin, packaged in a glass bottle, surrounded with frozen packets. It could easily have been broken. I have Ring video in addition to these photos. He arrived in a personal vehicle, not a commercial truck.
Expertly Mailed
Insulin needs to be kept cold at all times, but not frozen. Each shipment I have received was not only well protected from breakage, but was also insulted with Styrofoam
Insulin needs to be kept cold at all times, but not frozen. Each shipment I have received was not only well protected from breakage, but was also insulted with Styrofoam and five cold packs to keep the insulin cold, but not frozen in shipment. Shipping is fast. I forget at times to order till the last minute, I receive the package usually within two days of placing the order, if ordered weekdays. Highly recommend Chewy for this life saving medication for your pet. God Bless, Keith












