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Based on UK guidelines and common practice, a GP surgery may refuse to give a B12 injection a day earlier than scheduled for a patient with Pernicious Anemia for a few key reasons: Clinical Guidelines and Protocols Standard Treatment Schedules: The NHS and professional bodies like the British Society of Haematology have established guidelines for B12 injections for Pernicious Anemia
They may recommend adjusting the dosage, using a different form of B12, or exploring other supplementation methods, such as oral supplements or patches
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