If the insulin appears cloudy, discolored, has been exposed to heat, or is expired, dispose of it and start with a new bottle.

Double-check the syringe to make sure that you have the correct dosage. Your vet should provide you with clear instructions about how many units or milliliters to administer to your cat.

Don’t leave the insulin in the syringe for too long or it could bind to the plastic.

Ask your vet what to do if your cat skips a meal or vomits immediately after eating. They may recommend giving the cat a reduced dosage in these situations.

If your cat tends to struggle or panic during an injection, you may wish to ask someone else to help you hold or gently distract the cat while you administer the injection.

Avoid injecting the insulin into the same site repeatedly, as this can result in scar tissue buildup or granulomas.

You may wish to draw the plunger back slightly before you make the injection, to insure that you have not hit a blood vessel. If blood enters the syringe when you pull back the plunger, remove the needle and make the injection somewhere else. Replace the safety cap on the needle as soon as you have finished making the injection.