vitamin b12 injections drug interactions interactions: 6 types of medication that don't mix B12 injections and PBS -

Sometimes it can take a few trials to find the perfect pattern

Vegetarian and Vegan Support: Individuals following a vegetarian or vegan lifestyle often struggle to obtain sufficient B12 from diet alone

10.1007/s11606-021-06751-3 7 CamperiJ.CombesA.GuibourdencheJ.GuillarmeD.PichonV.FournierT.et al (2018)

Cyanocobalamin (Vitamin B12)..............5000 mcg Benzyl Alcohol (preservative).................1.0% v/v Sodium Chloride.................................0.22% w/v Ammonium Sulfate...............................0.1% w/v Citric Acid..........................................0.01% w/v Sodium Citrate..................................0.008% w/v Inject subcutaneously or intramuscularly

If you're not deficient, these injections are unlikely to be the 'magic bullet' you're looking for