how to prescribe vitamin b12 injection Dosage for Adults: Guidelines How to Dose with B12/MIC

Contact your GP if: You have been found to have elevated B12 levels and have not received an explanation or follow-up plan You are taking high-dose B12 supplements without medical supervision You develop new symptoms whilst taking B12 supplements, particularly skin changes, persistent headaches, or gastrointestinal symptoms You have risk factors for liver disease (alcohol excess, viral hepatitis, obesity) and have elevated B12 You experience unexplained weight loss, night sweats, or persistent fatigue alongside elevated B12 Seek urgent medical attention if you experience: Jaundice (yellowing of skin or eyes) Severe abdominal pain or swelling Unexplained bruising or bleeding Confusion or altered consciousness Severe, persistent vomiting These symptoms may indicate serious underlying conditions such as acute liver failure, haematological emergencies, or other critical illness requiring immediate assessment

Ruchi Gupta, the founding director of the Center for Food Allergy & Asthma Research at Northwestern University Feinberg School of Medicine in Chicago

Nevertheless, supplements can affect how certain medications work, and there are even supplements that you shouldnt take while youre on hormonal birth control (and some that are fine)

The most common side effect for these solutions is skin irritation

Long-term Management and Prevention of Deficiencies Managing Vitamin B12 and iron deficiencies needs a full plan