What is the best route for administering vitamin B12: intramuscular injection or subcutaneous injection? 7.4 Subcutaneous Injections Clinical Procedures for Safer Patient Care Subcutaneous Injection: What It Is and How to Give One 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 Subcutaneous Injection: What It Is and How to Give One