November 25, 2015
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"June 25, 2014 -- The glut of food products -- namely breakfast cereals and snack bars -- pumped up with vitamins and minerals puts children and pregnant women at risk for eating too much of a good thing, concludes a report out Tuesday.



Side Effects


Generalized: Anaphylactic shock and death have been reported with administration of parenteral vitamin B12 (See WARNINGS).

Cardiovascular: Pulmonary edema and congestive heart failure early in treatment; peripheral vascular thrombosis.

Hematological: Polycythemia vera

Gastrointestinal: Mild transient diarrhea

Dermatological: Itching; transitory exanthema

Miscellaneous: Feeling of swelling of entire body

Read the Cyanocobalamin (cyanocobalamin) Side Effects Center for a complete guide to possible side effects


Drug/Laboratory Test Interactions: Persons taking most antibiotics, methotrexate and pyrimethamine invalidate folic acid and vitamin B12 diagnostic blood assays.

Colchicine para-aminosalicylic acid and heavy alcohol intake for longer than 2 weeks may produce malabsorption of vitamin B12.

This monograph has been modified to include the generic and brand name in many instances.

Last reviewed on RxList: 10/23/2008

Side Effects

Cyanocobalamin - User Reviews

Cyanocobalamin User Reviews

Now you can gain knowledge and insight about a drug treatment with Patient Discussions.

Here is a collection of user reviews for the medication Cyanocobalamin sorted by most helpful. Patient Discussions FAQs

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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