Vitamin B12 Shots: Uses, Intake Levels, and Safety Instructions for B12 Injection Alan Health When the marrow wakes up potassium disappears B12 replacement triggers a metabolic surge Cells pull potassium inside serum levels crash The recovery phase is actually the danger Red urinary discolouration following hydroxocobalamin treatment for vasoplegic syndrome Canadian Journal of Anesthesia Journal canadien d'anesthsie Springer Nature Link Compounded Vitamin B Complex Injection Empower Pharmacy