can b12 injections cause nausea Why do I feel worse after a injection? Vitamin B12 Side Effects: Risks

Intravenous B12 Dose Considerations Healthcare providers must think carefully about Vitamin B12 IV doses

Dosing Calculation Examples If you reconstituted a 5 mg vial with 2 mL bacteriostatic water , your concentration is 2,500 mcg/mL: For 250 mcg dose: Draw 0.10 mL (10 units on insulin syringe) For 300 mcg dose: Draw 0.12 mL (12 units on insulin syringe) For 500 mcg dose: Draw 0.20 mL (20 units on insulin syringe) AOD-9604 Administration Guide Proper subcutaneous injection technique ensures optimal absorption, minimizes discomfort, and reduces risk of injection site reactions

I often get warmth and discomfort afterwards

Diabetes, 67 (Supplement 1), 233-LB