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Depending on your daily dose, a pen will typically last 1020 days

During storage: log temperatures, inspect for contamination, and discard solutions past recommended stability windows

B12 injections are available at: Primary care offices and specialty clinics Pharmacies (such as CVS, Walgreens, and others) Walk-in or urgent care clinics Some clinics and pharmacies offer self-injection training so that patients can administer injections at home when prescribed

Vegans and vegetarians often struggle to get enough B12 through food alone, but regular injections can bridge that gap safely and effectively

Instead, write to the doctor