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Popular Brands Hospira (Pfizer) Cyanocobalamin Injection American Regent Cyanocobalamin Fresenius Kabi Cyanocobalamin Sandoz Cyanocobalamin Teva Cyanocobalamin Strengths 1000 mcg/mL (standard adult & clinical dose) 500 mcg/mL (pediatric or dose-adjusted therapy) 2000 mcg/mL (high-strength for severe deficiency) Typical regimen: 1000 mcg IM weekly, then monthly maintenance (per healthcare providers direction)

See our reconstitution and storage guides for full step-by-step protocols and best practices

Endocrinology 2001

Hydroxocobalamin Drugs (BNF)

Repeated-dose studies in rats, dogs, and mice for up to 6 weeks across various routes showed excellent tolerance with minimal adverse findings

Subcutaneous Administration Guidelines Subcutaneous injections put Vitamin B12 into the fat just under the skin