Most diabetic cats require regular insulin injections to control their blood sugar levels. Diabetes rarely goes away completely and so these injections must be given on a regular basis (usually once or twice a day), for the rest of your cat's life. Your vet may need to help you work out a new diet and management plan for your cat. Injections should be given at set times each day but this can be arranged so that it fits into your usual schedule. Once the whole treatment schedule has been set you will have to stick to it in the future.