proper needle for b12 injection Dr. prescribed injections. Pharmacy only gave me vials. Where do you get your needles and syringes? What size?? Where do I inject? : r/B12_Deficiency Optimal B12 Injection Sites for

Although compounded medications are not FDA-approved, they must still meet USP standards for pharmaceutical compounding, which specify that once an expiration date is reached, the product cannot be guaranteed sterile or potent

Generally, the frequency differs from person to person and is decided by the doctor

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