User Icon
Free standard shipping on all orders until April 30, 2020.* View details >
  • ProZinc® insulin releases slowly over time to help maintain a stable, consistent blood glucose level throughout the day.

ProZinc® Insulin

ProZinc Insulin

*Prescription Required: Vetsource®, our pharmacy provider, may need to contact your veterinary hospital for prescription verification.

Learn More
We'll collect your pet information to verify this prescription with your veterinarian before shipping. Your prescription order will ship upon veterinarian approval.
Your Price $131.62
Retail Price
Strength / Size
Subscribe & Never Forget®
Never Forget! Subscribe to get special savings on pet products.
How it Works
Save on shipment costs when you subscribe to auto-delivery
Product Information

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.
Insulin requires refrigeration; all orders must be shipped overnight at an additional charge and are not eligible for free shipping. Orders only ship Monday-Thursday and will not be processed the day before a major holiday.

Active Ingredients

protamine zinc recombinant human insulin

Side Effects
Possible side effects of insulin therapy include hypoglycemia. Signs include hunger, lethargy, nervousness, vocalization, anxiety, muscle tremors or trembling, weakness, ataxia/unsteadiness. If there are signs of hypoglycemia, offer the pet some food or oral glucose. Positive response should occur within one to two minutes, then contact your veterinarian.

Other side effects may occur. If you notice anything changes in your pet, contact your veterinarian.

Developed For


Product Benefits

ProZinc® insulin releases slowly over time to help maintain a stable, consistent blood glucose level throughout the day.

Usage Guidelines

ProZinc® Insulin should be administered as directed by your veterinarian. Mix the insulin by gently rolling in your hand before each dose. Do not shake the vial. Only use U-40 syringes to measure this product accurately (sold separately). Injections should be given subcutaneously, just under the skin either along the back of the neck or on the side of the cat. Be sure to rotate injection sites to prevent skin problems at the injection site. Pinch a fold in the skin to create a small space for the needle. Insert the needle into the center of the fold as instructed by the veterinarian. Inject the drug by pushing the plunger as far as it will go. Withdraw the needle and be careful to not stick yourself. Dispose the needle immediately in a proper sharps disposal container. Insulin requires refrigeration and must be shipped overnight.

This medication is indicated for the reduction of hyperglycemia and hyperglycemia-associated clinical signs in cats with diabetes mellitus. 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 of a veterinarian as making the switch may require an adjustment in the dose.

Make sure to tell your veterinarian what other medication or supplements you are giving your pet. Dietary changes may also affect insulin requirements. Quite often your veterinarian may prescribe two different medications, even if a drug interaction may occur. In this case, your veterinarian may vary the dose and/or monitor your pet more closely. The following drug interactions that may occur with insulin include: Beta-adrenergic blockers, clonidine, and digioxin. Drugs that may increase hypoglycemic activity of insulin (resulting in low blood sugar) include: captopril, enalapril, alcohol, anabolic steroids, beta-adrenergic blockers, MAOI’s, guanethidine, phenylbutazone, sulfinpyrazone, sulfonamides, tetracycline, and aspirin, or other salicyclates. Drugs that may decrease hypoglycemic activity of insulin (resulting in high blood sugar) include: epinephrine, estrogen/progesterone combinations, furosemide, glucocorticoids, isoniazide, phenothiazine derivatives, thiazide diuretics, and thyroid hormones. Serum potassium levels can fluctuate in combination with digoxin and insulin and additional monitoring may be needed. Contact your veterinarian if your pet experiences any unusual reactions when different medications are given together.

Allergic reactions to medications may occur. Be sure to inform VetSource and your veterinarian if your pet has any known drug sensitivities or allergies. If your pet displays symptoms of an allergic reaction, call your veterinarian immediately or go to a veterinary emergency clinic. Symptoms may include but are not limited to: swollen lips, tongue, face, airways; difficulty breathing; agitation; profuse salivation; vomiting; widespread hives and itching.