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Cyanocobalamin Injection Generic Name & Formulations
Legal Class
Rx
General Description
Cyanocobalamin 1000mcg/mL; soln for IM or SC inj; contains benzyl alcohol.
Pharmacological Class
Vitamin.
How Supplied
Contact supplier.
Manufacturer
Cyanocobalamin Injection Indications
Indications
Vit. B12 deficiencies due to malabsorption. Pernicious anemia. Vit. B12 absorption test (Schilling test).
Cyanocobalamin Injection Dosage and Administration
Adult
Give by IM or deep SC inj. Pernicious anemia: 100mcg daily for 6–7 days; then 100mcg every other day for 7 doses; then every 3–4 days for 2–3 weeks; then 100mcg monthly for life. Deficiencies due to malabsorption: if severe, may need to treat like pernicious anemia; use oral preparations for chronic treatment. Schilling test: 1000mcg.
Children
See literature.
Cyanocobalamin Injection Contraindications
Contraindications
Sensitivity to cobalt.
Cyanocobalamin Injection Boxed Warnings
Not Applicable
Cyanocobalamin Injection Warnings/Precautions
Warnings/Precautions
Hereditary optic nerve atrophy (Leber's disease). Severe megaloblastic anemia (intense treatment may lead to hypokalemia and death). Monitor potassium for first 48 hours; replace if needed. Obtain hematocrit, reticulocyte count, Vit. B12, folate, and iron levels before and during treatment. Reevaluate periodically. Premature infants. Renal impairment (possible aluminum toxicity). Folic acid use may mask B12 deficiency. Pregnancy (Cat. C).
Cyanocobalamin Injection Pharmacokinetics
See Literature
Cyanocobalamin Injection Interactions
Interactions
Antibiotics, methotrexate, pyrimethamine interfere with Vit. B12 diagnostic tests. Colchicine, para-aminosalicylic acid, heavy alcohol intake for >2 weeks may produce malabsorption of Vit. B12.
Cyanocobalamin Injection Adverse Reactions
Adverse Reactions
Pulmonary edema, CHF, vascular thrombosis, polycythemia vera, transient diarrhea, itching, transitory exanthema; anaphylactic shock (may be fatal; do test dose if hypersensitivity suspected).
Cyanocobalamin Injection Clinical Trials
See Literature
Cyanocobalamin Injection Note
Notes
Formerly known under the brand names Berubigen, Cobavite, Rubivite, Rubramin PC, Vi-twel.
Cyanocobalamin Injection Patient Counseling
See Literature
