What kind of interaction is it?

Caution: an interaction that may reduce efficacy or raise side-effect risk and warrants monitoring.

Is this interaction backed by published research?

Yes. NutriStack lists 2 citation rows for the Berberine + Moxifloxacin pair, each linking to PubMed by PMID where available. Full sourcing methodology at https://nutristackapp.com/methodology/interactions.

Supplement × Prescription·a caution·Emerging evidence

Berberine + Moxifloxacin

Q: Can I take Berberine and Moxifloxacin together?

Possibly, but with caution. Berberine and Moxifloxacin have a documented caution-tier interaction. Moxifloxacin prolongs the QT interval, and combining it with berberine adds theoretical additive risk. Berberine inhibits the hERG potassium channel and has been associated with QT prolongation, and it can also lower blood glucose, which is relevant because fluoroquinolones themselves can cause dysglycemia.

Q: How does this affect a NutriStack Stack Score?

-5 to your Stack Score per scored caution row.

Caution Emerging evidence

Moxifloxacin prolongs the QT interval, and combining it with berberine adds theoretical additive risk. Berberine inhibits the hERG potassium channel and has been associated with QT prolongation, and it can also lower blood glucose, which is relevant because fluoroquinolones themselves can cause dysglycemia.

Supplement × Prescription

Open the interaction checker → Read the methodology

From the database

What the row says.

Every entry follows the same shape: what is happening, the mechanism, and the recommendation.

Substances

Berberine and Moxifloxacin

Pair type

Caution

Evidence

Emerging

Source citations

Scope

Supplement × Prescription

Last verified

June 4, 2026

CautionEmerging evidence

What is happening. Moxifloxacin prolongs the QT interval, and combining it with berberine adds theoretical additive risk. Berberine inhibits the hERG potassium channel and has been associated with QT prolongation, and it can also lower blood glucose, which is relevant because fluoroquinolones themselves can cause dysglycemia.

Mechanism. Both agents can prolong cardiac repolarization via hERG (IKr) potassium channel blockade, producing additive QT prolongation; berberine additionally exerts glucose-lowering effects that may compound fluoroquinolone-associated dysglycemia.

Recommendation. Use caution when combining berberine with moxifloxacin, particularly in patients with cardiac risk factors, electrolyte abnormalities, or other QT-prolonging agents. Consider pausing berberine during the antibiotic course and monitor glucose in diabetic patients.

Stack Score

How it moves the number.

Effect on the composite score

If both Berberine and Moxifloxacin are in the same stack, this pair applies −5 to your Stack Score (per scored caution row).

The full algorithm, the clamping rules, and four worked stacks are at /methodology/stack-score.

Sources

Sources, by evidence tier.

Every claim on this page is cited. PMIDs link straight to PubMed.

Reference material

1US FDA. Avelox (moxifloxacin) prescribing information: QT prolongation warning. Updated.Needs sourceNo link
2Wang L, et al. Berberine and cardiac ion channels: effects on hERG potassium current. Cardiovasc Drugs Ther. Review.Needs sourceNo link

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