Have you taken Prilosec, Prevacid, Zantec, or Tagamet for more than two years? Then discuss possible B12 concerns with your doctor. The Journal of the American Medical Association (JAMA) recently reported regular use of some over-the-counter or prescription drugs may increase the risk of vitamin B12 deficiency. These popular drugs include proton-pump inhibitors (PPIs) or histamine-2 receptor antagonists (H2RAs). Researchers from Kaiser Permanente California noted that these drugs suppress the production of gastric acid, making it more difficult to absorb vitamin B12. Users are advised to avoid these drugs or take the least amount possible.
Read the full article here: New Risk for Vitamin B12 Deficiency? – Ask Dr. Weil