vitamin b12 injectable methylcobalamin 1000mcg ml30ml vial injection prescribing information Cyanocobalamin Injection, USP 30000 Mcg/30 mL (1000 Mcg/mL) 30 mL CYANOCOBALAMIN INJECTION, USP 10,000mcg/10mL (1,000mcg/mL) – Dose:50 mg MAYALLOW Only One Chance - Possible side effects Headache
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