A pharmacist warns that individuals taking omeprazole or metformin should monitor for symptoms of vitamin B12 deficiency, which can develop slowly and go unnoticed.Common signs include fatigue, weakness, shortness of breath, headaches, dizziness, pale skin, and a sore tongue.The deficiency occurs when the body cannot absorb B12 properly, often due to medications like proton pump inhibitors (PPIs) or metformin.Risk factors include vegan/vegetarian diets, aging, digestive conditions, and long-term use of certain drugs.The article emphasizes the importance of dietary sources like meat, fish, eggs, and fortified foods, as well as supplements if needed.Healthcare professionals recommend blood tests to detect deficiencies early, with B12 injections available at some clinics.

The piece highlights that medications such as PPIs, H2 blockers, and anticonvulsants can interfere with B12 absorption, urging patients to consult doctors if they experience symptoms.