At Home Vitamin B12 4 Week Injection Package MUST BE A FLORIDA RESID CardioMender, MD How To Self Inject B12 Buy Vitamin B12 Injection at BiosenseClinic.com a Licensed Pharmacy Instruction Guide for Intramuscular (IM) Self injection of B12 Methylcobalamin 1mg 5mg B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics How To Give Yourself A B12 Shot At Home