can b12 injection cause constipation Vitamin B12: What Are the Health Benefits? Best Vitamin B12 Injection Site:

They may include: Slight discomfort at the injection site Mild redness or swelling Temporary dizziness Mild headache Serious side effects are uncommon, but it is important to discuss medical history, allergies, medications, and any concerns before treatment

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gauze packs 20-mL syringe with local anesthetic Sterile gloves, marking pen, and surface electrode One 1.5 -in., 25-gauge needle for skin infiltration A 10-cm long, short-bevel, insulated stimulating needle (15 cm for anterior approach) Peripheral nerve stimulator Injection pressure monitor Learn more about Equipment for Regional Anesthesia

Over 250 pounds (113kg+): Maximum standard dosing of 500mcg applies, though some individuals may benefit from extending cycle length rather than increasing dose