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NASO B12 NASAL SPRAY should be used with caution during pregnancy only if it is clearly necessary
However, the levels of cyanide resulting from cyanocobalamin are so minimal that the term toxic is hardly applicable here Build up in the cells: studies have shown that around 1000 g of cyanocobalamin accumulates in the cell fluid during therapy with high dosages (2)
A B12 injection informed consent form signed and dated by both patient and clinician demonstrates due diligence if a patient experiences an adverse event
doi:10.1136/bmj.324.7352.1512 Song C, He J, Chen J, et al
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