b12 nasal spray vs injection Nascobal (cyanocobalamin): Uses, Side Effects, Dosage & Reviews where to inject b12 subcutaneously
Description
Lidocaine local anesthetic used to decrease the pain associated with intramuscular injection
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Cochrane Database Syst Rev
It started after injection number 4 and when I mentioned it to the nurse administering the injections she was dismissive and didnt appear to know (or believe) it was a possible side-effect

How Often Can You Get a B12 Shot
