how fast does a b12 injection start working Do Injections Working? Feeling worse after B12 Injection:

Colchicine, para-aminosalicylic acid and heavy alcohol intake for longer than two weeks may produce malabsorption of Vitamin B12

Lipotropic injections are generally not recommended during pregnancy or breastfeeding, for people with a known allergy to any component of the formulation (including B12/cobalt), for those with certain kidney or liver conditions, or for those with certain medical conditions

Most patients experience little to no discomfort during the injection, and you can return to your regular activities immediately after

Fatigue and energy changes Some patients report initial fatigue when starting semaglutide, which can be confusing given that one of the supposed benefits of adding methylcobalamin is improved energy

Before taking this medicine You should not use Vitamin B12 if you are allergic to cyanocobalamin or cobalt, or if you have Leber's disease (an inherited form of vision loss)