mayo clinic b12 injection how often Vitamin Injection: Complete Guide Pernicious Anemia: Genomics and B12

doi:10.1212/01.wnl.0000325581.26991.f2

I honestly dont think it really matters which route you choose

High B12 levels: causes, symptoms, and next steps High B12 levels are often less straightforward than low levels

Blood, 112(6), pp.2214-2221

Other reactions warranting urgent GP contact include: Unexplained muscle weakness or cramping Persistent vomiting or severe abdominal pain Signs of hypokalaemia (low potassium) during initial treatmentmuscle weakness, irregular heartbeat, or severe fatigue In patients with severe, longstanding B12 deficiency, rapid correction can occasionally precipitate hypokalaemia as new red blood cells are produced, consuming available potassium

Wren, Boyle, and the Origins of Intravenous Injections and the Royal Society of London