Subcutaneous Injection: What It Is and How to Give One B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics Needle Injection Techniques Every Nurse Should Know! Whether you're prepping for your NCLEX or brushing up on your skills, here's a quick breakdown of the most common injection routes you'll encounter How to Administer an Intramuscular Injection at Home