Vitamin B12: What Affects The Test
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What Affects the Test
Reasons you may not be able to have the test or why the results may not be helpful include:
- Taking medicines, such as para-aminosalicylic acid, phenytoin (Dilantin), neomycin (Mycitracin), metformin (Glucophage), colchicine, omeprazole (Prilosec), lansoprazole (Prevacid), pantoprazole (Protonix), rabeprazole (such as Aciphex), methotrexate, triamterene, and birth control pills.
- Being pregnant or breast-feeding.
- Taking large doses of vitamin C.
- Drinking large amounts of alcohol.
- Having a test, such as a computed tomography (CT) scan, that used dyes in the past 7 days.
- Having pernicious anemia ,which means you lack the substance (intrinsic factor) needed to absorb vitamin B12.
| Last updated: | February 14, 2007 |
|---|---|
| Author: | Jan Nissl, RN, BS |
| Reviewed By: | Kathleen Romito, MD - Family Medicine, Brian Leber, MDCM, FRCPC - Hematology |
| Editors: | Susan Van Houten, RN, BSN, MBA, Tracy Landauer |
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