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Other common side effects of B12 injections include: Diarrhea Headache Swelling (and not only at the site of the injection) If you experience any uncommon side effects, such as chest pain or hives, contact your health care provider immediately
Both are valid
Eventually, nothing at all
0.3 mL / 30-unit U-100 syringes are the most practical for typical 18-30 unit draws
US$ 24.49
US$ 20.92
US$ 28.46
