what does a b12 injection do for a dog Part II: How Important Vitamin is Your Dog's Diet Vitamin B-12 1000mcg - Injection

Drug-induced secondary adrenocortical insufficiency may result from too rapid withdrawal of corticosteroids and may be minimized by gradual reduction of dosage

PMID 16344991

Food and Drug Administrations drug review process

4.8 Undesirable effects As most undesirable effects are based on post-marketing spontaneous reporting, frequency estimation is not possible

11-oxoandrostenedione (11-OXO)) Epistane (17-methylepithiostanol) Ractopamine S-23 YK-11 Its important to remember that while the Prohibited List includes many examples, it is not exhaustive, and new examples may be added during the year

Storage Information: Store at 20 to 25C (68 to 77F) [see USP Controlled Room Temperature]