Instruction Guide for Intramuscular (IM) Self injection of B12 Methylcobalamin 1mg 5mg B12 Injections for Energy: Benefits and How It Works AZ IV Medics Buy Methylcobalamin B12 (Methycobal) 500 mcg. 50 ampoules HOW TO SELF INJECT B12 AT HOME with Dr. Tyler Rogers If you've been prescribed vitamin B12 shots or exploring at home wellness, this step by step guide will walk you through how How to Give an Intramuscular Injection 1. Use an alcohol swab to clean the skin where you will give yourself the shot. 2. Hold the muscle firmly and insert the needle into