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[1] Other rare side effects noted (mostly in older literature or high-dose use) include: polycythemia vera and peripheral vascular thrombosis in patients receiving repeated injections (though these associations are not well understood, they were listed in prior product literature as possible adverse events)

[4] Normal levels of B vitamins in breast milk are desirable, as they support the infants developing metabolism

pregnant women often receive IV thiamine if needed (e.g., for hyperemesis) without issue

[7] Use is also contraindicated in patients with arterial bleeding

Marking the date of first use on the label can be helpful

( What is Vitamin B-Complex Injection and why do I need it