PMCID: PMC8228232
Hydroxocobalamin 1mg intramuscular injections reactivate metabolic pathways after chronic deficiency, potentially causing temporary symptoms during adjustment Common side effects include injection site pain, headaches, and nausea, typically resolving within 2472 hours Rapid red blood cell production may increase demand for folate and iron, occasionally creating relative deficiencies in these co-factors Serious reactions requiring urgent assessment include difficulty breathing, chest pain, severe weakness, or progressive neurological symptoms Recovery follows a predictable pattern: blood cell improvement within 35 days, haemoglobin normalisation over 12 months, neurological recovery potentially taking several months Table of Contents Why Do I Feel Worse After My B12 Injection
Further still, when patients dont get enough of this vitamin, many experience symptoms of diffuse hair loss
Coord Chem Rev, 2022, 451: 214268 Abbas MA, Kamat PV, Bang JH
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Doctors decide on B12 injections based on a full check-up and lab tests to confirm the deficiency