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Vetsulin Rx

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Vetsulin Insulin for Cats and Dogs

Dogs and cats suffering from diabetes mellitus can’t metabolize sugar in their bodies properly.  Injectable Vetsulin gives your pet the insulin required to convert glucose into the energy your pet needs.

  • Treats diabetes
  • For cats and dogs
  • Administered by injection

Diabetes is a chronic condition in cats and dogs that causes a range of symptoms. But the disease can be managed through diet and with medication like Vetsulin. This veterinary insulin is designed to help cats and dogs maintain the right blood sugar levels. The prescription medication helps the body use glucose properly so your pet has the energy he needs. Vetsulin is injected into the body and must be kept refrigerated.

What you should know about Vetsulin:

  • Talk to your veterinarian before using this product.
  • Follow dosing directions exactly - don’t give your pet more medication than directed and don’t skip doses.
  • Used with U-40 insulin syringes.
  • Read the label carefully for information about storage, possible side effects, and drug interactions.

Vetsulin VetPen Starter Kit

VetPen is an automatic insulin delivery pen device that is designed for the injection of insulin in diabetic pets. If your pet has diabetes, your veterinarian may prescribe at home insulin injections as a method of treatment. The VetPen uses a multi-dose insulin cartridge that is selected by turning a dial on the bottom of the pen for a more accurate and convenient method of dosing. It uses replaceable, single use pen needles for the administration of insulin. VetPen is available in two increment sizes and comes with its own starter kit. Consult with your pet’s veterinarian before using this product and follow their specific instructions for use.

VetPen is available in two sizes:

  • VetPen 8 which delivers 0.5-8 units in ½ unit increments
  • VetPen 16 which delivers 1-16 units in 1 unit increments


VetPen Starter Kit Includes:

  • 1 VetPen
  • 1 Travel Pouch
  • 1 Needle Remover
  • 1 Dose Selector Applicator
  • 1 Release Button Extension
  • 28 VetPen Needles
  • 1 Instruction Manual


*VetPen is designed for use only with VetPen Needles and Vetsulin cartridges.  

Vetsulin VetPen Needles

VetPen Needles are a single use insulin pen needle designed exclusively for use with the VetPen. It is a 29 gauge needle that is 12mm in length. Each needle comes individually packaged with two safety seals for protection. VetPen needles are triple sharpened and lubricated to help lessen discomfort of injections. Consult with your pet’s veterinarian before using this product and follow their specific instructions for use. Available in packs of 100. For use only with VetPen.

Vetsulin VetPen Insulin Cartridges

Vetsulin is a porcine insulin that is commonly used in the treatment of diabetes. Insulin is a hormone that is naturally produced by the pancreas that converts sugar (glucose) to energy. Diabetes occurs when the body does not produce insulin or is unable to use insulin properly. If you pet has been diagnosed with diabetes, your veterinarian may prescribe an insulin therapy such as vetsulin. Insulin is commonly given by subcutaneous injections (under the skin). This vetsulin is contained within a cartridge that is designed exclusively for use in the VetPen. The VetPen is an automatic insulin delivery device that features a dial for dosing and replaceable needles. Consult with your pet’s veterinarian before administering this product and follow their specific guidelines for use. This product is sold in a pack of 10 x 2.7mL vials that are measured 40 units/ml (U-40). For use only with VetPen.


  • Read and follow the prescription label carefully for storage information, possible side effects, and drug interactions.
  • Give the exact amount prescribed and only as often as directed.
  • Do not skip doses or stop giving the medication without consulting your veterinarian.
  • For additional information about Vetsulin, click the “More Information” and “Package Insert” tabs above. 


Vetsulin requires overnight shipping.

Please provide a shipping address where someone will be available to take possession of the package and refrigerate if necessary.

Vetsulin's Client Information Sheet opens in a new window. has information and an VetPen administration video

You can find a package label which provides more detailed information on Vetsulin's indications, forms of administration, and side effects, along with other clinical information, by following the link below:

Vetsulin Package Label*


Vetsulin's package insert does not take the place of instructions from your veterinarian. Talk to your pet’s veterinarian or pharmacist if you do not understand the information provided in this document or if you have any questions about Vetsulin insulin for dogs and cats.


*This link opens in a new window.