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LeWine, MD, Chief Medical Editor, Harvard Health Publishing

The answer is that it really depends, but in my experience, MOST patients are fine to use subcutaneous injection-sized needles

You can, however, select an extended insurance plan that covers the injection plus the appointment fees and specialized treatment costs related to vitamin B12 deficiency

Administering Medications by Injection Service What is a medication by injection Care Clinic

Monitor patients closely for signs of systemic toxicity, including central nervous system depression, cardiovascular effects, and allergic reactions