Drug interactions
Pantoprazole + Vitamin B12
Severity: Minor
Pantoprazole and Vitamin B12: minor interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Prolonged pantoprazole therapy lowers gastric acid, reducing release of vitamin B12 from food protein. This may contribute to lower B12 levels over time, particularly in older or poorly nourished patients.
What this interaction means in plain words
Pantoprazole and Vitamin B12 have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Pantoprazole belongs to Gastrointestinal Tract; Vitamin B12 belongs to Gastrointestinal Tract.
Why it happens
Reduced gastric acid and pepsin activity impairs liberation of protein-bound vitamin B12 for absorption.
What to do
Monitor serum B12 in patients on long-term pantoprazole with risk factors or neurologic or hematologic symptoms. Supplement if deficient.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Vitamin B12
- Chloramphenicol + Vitamin B12 Moderate
- Dichlorphenamide + Vitamin B12 Moderate
- Metformin + Vitamin B12 Moderate
- Neomycin po + Vitamin B12 Moderate
- Aspirin / citric acid / sodium bicarbonate + Vitamin B12 Minor
- Aspirin + Vitamin B12 Minor
Other interactions of Pantoprazole
- Pantoprazole + Rilpivirine Contraindicated
- Acalabrutinib + Pantoprazole Major
- Atazanavir + Pantoprazole Major
- Dacomitinib + Pantoprazole Major
- Dasatinib + Pantoprazole Major
- Erlotinib + Pantoprazole Major
Frequently asked questions
Can I take Pantoprazole with Vitamin B12?
MediHelp rates the interaction as minor. Pantoprazole and Vitamin B12 have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Prolonged pantoprazole therapy lowers gastric acid, reducing release of vitamin B12 from food protein. This may contribute to lower B12 levels over time, particularly in older or poorly nourished patients.
How serious is the interaction between Pantoprazole and Vitamin B12?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor serum B12 in patients on long-term pantoprazole with risk factors or neurologic or hematologic symptoms. Supplement if deficient.
What other medicines interact with Vitamin B12?
MediHelp also lists interactions of Vitamin B12 with, for example, Chloramphenicol, Dichlorphenamide, Metformin. The full list is on the Vitamin B12 page.
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