B12 (cobalamin) is a water-soluble vitamin essential for neurological function, red blood cell formation, and DNA synthesis Joint pain is not listed as a recognised adverse effect in the BNF or licensed B12 product information When joint discomfort occurs after starting B12, it is typically coincidental or related to excipients, injection technique, or pre-existing conditions Severe B12 deficiency itself can cause neuropathic symptoms that may be misinterpreted as joint pain Do not discontinue prescribed B12 treatment without medical guidance, particularly for confirmed deficiency or pernicious anaemia Seek prompt medical advice for severe joint pain, hot swollen joints with fever, or symptoms of allergic reaction Table of Contents Can Vitamin B12 Cause Joint Pain
Eli Lilly, which manufactures tirzepatide, said it replicated the finding and published an open letter calling for a nationwide recall of tirzepatide products containing untested additives
Contraindications include active infection at the injection site, severe thrombocytopenia, or anticoagulation therapy requiring provider clearance
Some medical conditions or medications can make it less effective or potentially unsafe
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