b12 injection make you sleepy How Soon Do Feel Less Tired After a Injection? Feeling worse after B12 Injection:

When its not possible to obtain sufficient vitamin B12 from your diet, as a result of genetic problems, other health conditions or taking necessary medications, a person may choose to boost their levels with proper supplements, medications or B12 injections.

Reconstituted: Store at 28C

1982 Jun 16;716(3):400-9

Important safety information includes a boxed warning for thyroid C-cell tumors (contraindicated in patients with personal/family history of medullary thyroid carcinoma or Multiple Endocrine Neoplasia syndrome type 2) and warnings for pancreatitis, gallbladder disease, acute kidney injury, and hypoglycemia risk when used with insulin or sulfonylureas