Subcutaneous Injection: What It Is and How to Give One How SubQ Injections Like B12 and NAD+ Fit Your Routine Olympia Pharmaceuticals Sublingual B12 vs Injection WhyNotNatural CYANOCOBALAMIN INJECTION, USP 30000 mcg 30 mL (1000 mcg mL) 30 mL VIAL Lipo B Injection Empower Pharmacy Understanding the 4 main types of injections makes medical knowledge simple and clear. Intramuscular, Subcutaneous, Intradermal & Intravenous each one plays a different role in treatment. Stay informed, stay safe!