How Long Do B12 Injections Last: 5 Ways to Extend Effects B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics Cyanocobalamin (Vitamin B12) Injection 1000 mcg mL, Multiple Dose Vial 1 mL, 25 Tray McGuff Hydrate Mondays are for MIC shots! What exactly is MIC, you ask? MIC injections contain a combo of 3 different amino acids: methionine + inositol + choline, plus a dose