6Vitamin B 12 Vitamin B 12. We recommend that patients get 2000 mcg intramuscularly once a week for six weeks. This may well help their sensory neuropathy but also often increases the patient’s energy level. With one exception, we have never seen a reaction to vitamin B12 injections, even in very sensitive patients. B12 injections often provide significant improvement even if base line blood levels of B12 are within normal limits.Modified:
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