Can I Inject Insulin into Muscle?

Integrated Diabetes Services provides detailed advice and coaching on diabetes management from certified diabetes educators and dieticians. Each week, the team answers questions from people affected by Type 1 diabetes.

Q: Is there any reason not to inject insulin directly into muscle?

A: There is really no medical evidence that intramuscular injections are harmful. They hurt more than subcutaneous injections and people need to use sterile syringes to prevent infection, but otherwise this type of injection can speed up insulin action considerably. In fact, absorption occurs twice as fast in most cases. This can be a useful tool for bringing high blood glucose levels down quickly or for avoiding blood sugar spikes when consuming high glycemic meals without a pre-bolus.

Have a Question? Insulin-Quiring Minds is a free service of the clinical team at Integrated Diabetes Services LLC. Submit your questions to All questions will be answered, and yours may be chosen to appear in Insulin Nation.

For more information on Integrated Diabetes Services, call 1-610-642-6055, go to or write to

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Jennifer Smith holds a Bachelor’s Degree in Human Nutrition and Biology from the University of Wisconsin. She is a registered and licensed dietitian, certified diabetes educator, and certified trainer on most makes/models of insulin pumps and continuous glucose monitoring systems. She has lived with Type 1 diabetes since she was a child,and thus has first-hand knowledge of the day-to-day events that affect diabetes management.

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