can b12 injection cause fever Doctor explains clinical signs of Vitamin (cobalamin) deficiency Metformin and Vitamin B12: A

Mounjaro is a once-weekly injection containing the active ingredient tirzepatide

This timeline matches B12 pharmacokinetics: intramuscular methylcobalamin reaches peak serum concentration at 8-12 hours, but tissue saturation (particularly in the liver and nervous system) occurs over 48-72 hours as the vitamin is transported into cells and converted to active coenzyme forms (Andrs et al., 2018)

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SNPs in these genes can influence the conversion of cobalamin into its active forms (methylcobalamin and adenosylcobalamin) as well as the homocysteine metabolism pathway

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