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cold symptoms after b12 injection Feeling worse Injection: Answering concerns Why do I feel worse
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Do not use this medicine after the expiry date has passed

But, for the overwhelming majority
B12 Injections & Neuropathy: How They Help When administered through injections injected intramuscularly and perineurally (near the affected nerve areas) Vitamin B12 supports: 1

They serve different purposes but often need clarification

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