How do I give my cat insulin at home?

You will want to start by being sure you have the correct insulin syringes for your cat. There are two different types of insulin syringes available – U-40 and U-100 syringes. Each has its own benefits, but they are only useful with the correct insulin.

Checking the Insulin Vial

Check your insulin vial before drawing up any insulin; ensure that the insulin appears normal, with no foreign material floating in it, and that the vial is not broken or damaged. Confirm that you are using the correct insulin, especially when you purchase a new vial.

Ensuring Your Cat Has Eaten

Before preparing and injecting your cat with insulin, make sure that he has eaten (or is eating when the injection is given). It is not a good idea to give insulin to a cat that isn’t eating, as it can cause hypoglycemia (low glucose levels), which can lead to severe problems if left untreated.

Preparing the Insulin

  1. Gently roll the insulin vial between your hands to mix the insulin. Do not shake the vial.
  2. Turn the vial upside down and insert the syringe into the top.
  3. Draw back on the syringe plunger to draw out the insulin. Check for air bubbles and the correct dosage. Flick the syringe to remove air bubbles if needed.
  4. Remove the syringe from the vial and store the insulin properly (see “Diabetes Series – Part 3” for more information on insulin storage). Place the cap on the syringe if the injection is not given immediately.

Administering the Insulin Injection

  1. Position yourself and your cat comfortably for the injection.
  2. Double-check the amount of insulin in the syringe.
  3. Lift the skin at the scruff of the neck and insert the needle as instructed by your veterinarian.
  4. Press the plunger all the way to administer the insulin dose.
  5. Remove the needle, recap it, and dispose of it in a thick plastic container or biohazard container provided by your veterinary clinic or pharmacy.

Injection Site

Most cats receive injections in the scruff of the neck or a bit lower on the back. The injection should always be subcutaneous (under the skin), not into a muscle or vein. You may feel a slight "pop" as the needle goes through the tough outer layer of skin.

Important Reminder

It is very important to NEVER adjust your cat’s insulin dosage without consulting your veterinarian, as this could severely impact your cat’s health.

If you are interested in a demo on how to give your cat insulin injections, contact us at Brantford’s Park Road Veterinary Clinic.

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