are there any side effects from having b12 injections What Happens When You're Allergic to Vitamin What Are B12 Shots? 5

Interference with Diagnostic Tests: May affect results of certain laboratory tests, consult with laboratory personnel for appropriate interpretation

Excretion Mainly excreted through urine and bile, with a half-life of approximately 6 to 8 hours

Children presenting neurological signs or symptoms, those unable to take oral medication, individuals with known malabsorption syndromes, infants under 6 months old, and patients using medications that may interfere with vitamin B12 absorption are typically treated with a parenteral protocol (1)

Human studies have mainly described pharmacokinetics, safety, and tolerability, rather than demonstrating strong clinical effectiveness

Do not increase dose during weeks 1-2 regardless of lack of visible results

Digestive conditions like Crohn's disease and celiac disease create similar absorption problems