IM injection sites (intramuscular injections) made easy for nursing school students, nurses, and more! This includes a quick summary of the IM injection sites, along with some details such as landmarks and Intramuscular injection is shown at 90 because the goal is to reach the muscle, the deepest layer in this comparison. That route is chosen when medication needs reliable absorption through the muscle's Sites of Administration of Subcutaneous injection B12 vitamin Store A Manual for you all: What are B12 injections? Where to give B12 injections shots? How to give B12 injections? B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics Best Vitamin B12 Injection Sites MedHealth 360