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*Compounded drugs are permitted to be prescribed under federal law but are not FDA-approved and do not undergo FDA review for safety, effectiveness, or quality

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Once opened, store at 2-8C and use within 28 days

A needle is inserted into the vein to collect the sample

However, several medicines and substances can reduce the absorption or levels of vitamin B12 , including metformin, proton pump inhibitors, colchicine, chloramphenicol, aminosalicylic acid, neomycin, and heavy alcohol use

Patients should also prioritize self-care, including physical health through exercise and a healthy diet, as well as mental health through relaxation techniques and stress management