Potential Risks Risks depend on the exact product and your health history, but can include: Injection-site reactions (pain, bruising, swelling) Allergic or hypersensitivity reactions (rare but possible) Product-quality risks if the mixture is compounded and not prepared under appropriate standards For B12 injections specifically, review FDA-approved labeling and warnings (see the FDA prescribing information for cyanocobalamin injection )
Vitamin B12 does require the initial loading dose period, especially in very deficient cats, so improvements will not be immediate
Vegetarians and vegans are at higher risk of B12 deficiency because B12 comes mostly from animal foods, so the B12 in a B12/lipotropic injection is more likely to correct a real shortfall and lift your energy
Keep enough time for processing, travel, and any clinical questions that may need clarification
Consider reducing dose to see if effects diminish
Treatment is Vitamin B12 supplements