why do i feel worse after my b12 injection Shots: Taking It? Why Do I Feel Worse

For those who suffer from a vitamin B12 deficiency, injections will likely be recommended every 10 days as a build-up phase and then will continue as a monthly treatment or to be administered every 2 to 3 months in order to completely reverse the side effects of the deficiency

These injections typically contain hydroxocobalamin or cyanocobalamin, with hydroxocobalamin being the preferred formulation in the UK as it is retained in the body for longer periods

Vitamin B12 deficiencies due to malabsorption which may be associated with the following conditions

Use bacteriostatic water (0.9% benzyl alcohol) for multi-dose vials

If your B12 levels are normal, additional B12 may not improve mood or mental sharpness