fever after b12 injection Shots Side Effects And How To Treat Them Benefits of Vitamin B12 Shots

Xiao, H

Avoid or limit alcohol consumption while taking this medication

Additional risk factors include: Chronic kidney disease : Reduced renal clearance may impair B12 excretion Liver disease : Hepatic dysfunction can disrupt B12 metabolism and storage Myeloproliferative disorders : Certain blood cancers increase B12-binding proteins Concurrent medication use : Some drugs may interact with B12 metabolism, including metformin, proton pump inhibitors, and H2 antagonists Patients with these conditions should have B12 supplementation carefully monitored by their healthcare team

Side effects are rare but may include mild discomfort at the injection site, nausea, or digestive upset

You may experience redness, swelling, or a mild tenderness

Your doctor also will review your medical history for medical illnesses (diabetes, immune disorders) or surgeries, such as stomach removal, that can lead to B 12 deficiency