b12 injection with a cold Shots | Pensacola, FL Why Do I Feel Worse
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If the medication has been frozen, even briefly, it should not be used and should be properly disposed of according to pharmacy guidelines

It is also worth being explicit about what documented means here, because it is the load-bearing word for a YMYL page

ods.od.nih.gov

Prolonged deficiency can cause irreversible nerve damage, leading to balance and coordination problems
