feeling worse after b12 injections Common & Rare Side Effects of Vitamin can b12 injections cause anxiety

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Higher Potency: Certain health conditions, like vitamin B12 deficiency or chronic fatigue syndrome, may require higher doses that oral supplements can't provide effectively

Vitamin B12 Medicine Interactions Chloramphenicol: bacteriostatic antibiotic can interfere with red blood cell response to supplemental Vit B12 Proton pump inhibitors: omeprazole and lansoprazole, etc., slow gastric acid release and may interfere with VIt B12 absorption from food H2-receptor antagonists: cimetidine, famotidine and ranitidine slow the release of hydrochloric acid into the stomach and interfere with Vitamin B12 absorption from food Metformin: might reduce absorption of Vitamin B12 due to altered intestinal motility, increased bacterial overgrowth, etc

Reduced shedding

High doses of either form may cause liver dysfunction with long-term use