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therefore, patients older than 50 years and vegans or strict vegetarians should consume foods fortified with vitamin B 12 or take vitamin B 12 supplements
FDA (April 2026) Certain Bulk Drug Substances for Use in Compounding that May Present Significant Safety Risks U.S
At 20mg/mL (20mg vial + 1mL water), a 4mg dose requires 20 units
Common, mild side effects: Pain, redness, or itching at the injection site Mild nausea or diarrhea Headache Temporary dizziness Rare but more serious reactions: Allergic reactions (rash, swelling, breathing difficulty) Heart palpitations Low potassium levels during rapid correction of severe deficiency Very rare cases of anaphylaxis requiring emergency care Seek medical attention immediately if you experience symptoms of a serious allergic reaction
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