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Johns Hopkins University

University of Illinois Chicago, College of Pharmacy

Private consultation with a trained pharmacist Clinical assessment and consent Intramuscular Vitamin B12 injection (upper arm) Aftercare advice and safety-netting How often will I need injections

Pregnancy Adequate and well-controlled studies have not been done in pregnant women

The body readily converts cyanocobalamin to active forms through normal metabolic pathways, so bioavailability differences between B12 forms are minimal in individuals with intact conversion capacity

Confusing 0.2 mL with 20 units on one syringe, then using a different syringe later