What are the cardiac risks of methylcobalamin (vitamin B12) in a patient with a history of cardiac conditions, particularly regarding QT/QTc interval prolongation?

Medical Advisory BoardAll articles are reviewed for accuracy by our Medical Advisory Board

Educational purpose only • Exercise caution as content is pending human review

Article Review Status

Submitted

Under Review

Approved

Last updated: January 19, 2026 • View editorial policy

Personalize

Help us tailor your experience

Which best describes you? Your choice helps us use language that's most understandable for you.

Related Questions

What are the precautions for using Hydrochlorothiazide (HCTZ) in patients with a history of cardiovascular disease, considering its potential to prolong the QT (QT interval)/QTc (QT corrected interval) interval?

What are the implications and management of a prolonged QTc (corrected QT interval) interval of 469 ms in a female?

What is the actual complication rate of prolonged QT(c) (Corrected QT) interval?

How to manage a patient with a significantly prolonged QTc interval?

Is it safe to initiate ribociclib (Ribociclib) in a patient with a prolonged QTc (QT corrected) interval of 492 milliseconds?

What are the cardiac monitoring recommendations for a patient with a history of cardiac conditions taking fluoxetine (Prozac) due to the risk of QT/QTc interval prolongation?

What are the appropriate next steps for a patient who awakens with headaches, possibly indicating a primary headache disorder or a more severe condition such as subarachnoid hemorrhage or meningitis?

What is the recommended treatment approach for Sweet syndrome in pediatric patients?

What is the initial approach to a 47-year-old woman presenting with epigastric pain?

What is the role of acetazolamide (carbonic anhydrase inhibitor) augmented Technetium-99m (TC 99m) ethyl cysteinate dimer (ECD) scan in diagnosing and managing cerebral blood flow in patients with Moya Moya disease?

What are the necessary monitoring and management steps for a patient with suspected Rheumatoid Arthritis (RA) started on sulfasalazine, particularly regarding cardiovascular (CV) risk factors?

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

Have a follow-up question?

Our Medical A.I. is used by practicing medical doctors at top research institutions around the world. Ask any follow up question and get world-class guideline-backed answers instantly.