What kind of interaction is it?

Synergy: a documented combination effect that is stronger or more useful than either substance taken alone.

Is this interaction backed by published research?

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

Interaction databaseSupplement × PrescriptionReviewed May 2026

Dofetilide and Potassium, a synergy.

Q: Can I take Dofetilide and Potassium together?

Yes. The combination of Dofetilide and Potassium produces a measurable benefit. Dofetilide prolongs the QT interval and can cause torsades de pointes, particularly when potassium is low. Maintaining normal serum potassium is a core safety measure during dofetilide initiation and ongoing therapy. Potassium supplements should be treated like a monitored medication because both low and high potassium can be dangerous.

Q: How does this affect a NutriStack Stack Score?

+2 to your Stack Score per scored synergy row.

Dofetilide prolongs the QT interval and can cause torsades de pointes, particularly when potassium is low. Maintaining normal serum potassium is a core safety measure during dofetilide initiation and ongoing therapy. Potassium supplements should be treated like a monitored medication because both low and high potassium can be dangerous.

2 primary source citations. Strong evidence. Last verified May 30, 2026.

Open the interaction checker →Read the methodology

One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
Same shape as the other 1,729 pairs in the public database.

Sourcing standards·Evidence tiers

From the interaction database

What the row says.

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

At a glance

Substances: Dofetilide and Potassium
Pair type: Synergy
Evidence (highest tier): Strong
Source citations: 2 sources
Stack Score effect: +2 to your Stack Score (per scored synergy row).
Scope: Supplement × Prescription
Last verified: May 30, 2026

Synergy · Strong evidence

Synergy

What is happening. Dofetilide prolongs the QT interval and can cause torsades de pointes, particularly when potassium is low. Maintaining normal serum potassium is a core safety measure during dofetilide initiation and ongoing therapy. Potassium supplements should be treated like a monitored medication because both low and high potassium can be dangerous.

Mechanism. Dofetilide is a selective IKr blocker. Hypokalemia further suppresses repolarizing potassium current and increases early afterdepolarizations, making torsades more likely.

Recommendation. Keep potassium in the normal range and follow your prescriber's lab-monitoring plan, especially during dofetilide initiation, dose changes, illness with vomiting or diarrhea, or diuretic use. Do not start potassium supplements unless your clinician is monitoring your blood level and kidney function.

Sources (2)

Stack Score

How this pair moves the number.

Effect on the composite score

If both Dofetilide and Potassium are in the same stack, this pair applies +2 to your Stack Score (per scored synergy row).

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

Check your full routine

One pair was the worked example. NutriStack runs every pair in your stack at once.

Drop in your supplements and prescriptions and the public database surfaces every interaction, synergy, timing rule, and contraindication, every one linked to its primary source.

Open the interaction checker →Browse the full research index