Is Magnesium Safe with Voriconazole?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Magnesium levels must be corrected to normal before initiating voriconazole. Do not self-supplement with magnesium during therapy without physician guidance. Report any irregular heartbeat, fainting, or chest discomfort immediately.
Why this interaction occurs
Voriconazole carries a well-documented risk of QT interval prolongation. Hypomagnesemia is a major independent risk factor for QT prolongation and Torsades de Pointes. The combination significantly amplifies cardiac arrhythmia risk. Clinical guidelines specifically recommend correcting electrolyte disturbances, including magnesium, before and during voriconazole therapy.
Evidence
Evidence level: strong.
Data source
PubMed: PMID 19384521
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 22,258 reports mentioning Voriconazole. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Voriconazole + supplement combination on this page.
FAERS reports are voluntary and cannot prove that a drug caused an event. Do not use report counts to assess the safety of this specific drug-supplement pair.
Frequently asked questions
Related interactions
All Magnesium interactions → · All Voriconazole interactions →
Already checked this one — check your whole list
Educational only — not medical advice.
Always confirm with your doctor or pharmacist.