Subcutaneous Injection: What It Is and How to Give One B12 vitamin Store A Manual for you all: What are B12 injections? Where to give B12 injections shots? How to give B12 injections? How to Give Yourself an Intramuscular Injection Learn how to administer your own SubQ (subcutaneous) injections at home with confidence. Our step by step guide covers everything you need to know, from preparing your supplies to safely injecting the medication. Our Insulin Injection Sites: Where and How to Inject How to Use These 4 IM Injection Spots Safely