The short answer
Nadolol can affect potassium shifts, and added potassium should be reviewed against kidney function and blood tests. The available experiment does not establish a universal risk level or spacing rule.
What this answer covers
Oral nadolol with the exact supplement preparation described below.
- Supplement or preparation
- Potassium
- Medication ingredient
- nadolol
An exact-drug experiment found a potassium signal
Nadolol increased exercise-associated serum potassium in a small healthy-volunteer crossover study. This was an acute physiologic experiment, not a trial of routine potassium supplements.
Kidney function adds important context
Nadolol is cleared mainly by the kidneys. Changes in kidney function can affect its exposure and also matter when clinicians assess potassium balance. Your current test results are more useful than assuming one risk estimate applies to everyone.
Spacing is not a proven solution
The study did not test an hours-apart strategy. Do not stop needed replacement or restrict ordinary foods solely because of this interaction flag; ask the treating team about the amount and monitoring plan.
Keep the prescribed treatment plan
Do not stop nadolol abruptly or adjust the dose to compensate for a supplement. Bring the product label and your recent blood-pressure and pulse readings to your pharmacist or prescriber so any change can be assessed in context.
Evidence and practical considerations
Side effects & toxicity
Nadolol can affect potassium shifts, and added potassium should be reviewed against kidney function and blood tests. The available experiment does not establish a universal risk level or spacing rule.
- Exact scope
- Oral nadolol with the exact supplement preparation described below. with Oral nadolol; intravenous cases are identified as indirect route evidence where discussed.
- Medication form and route
- oral
What remains uncertain
- Exact-drug human exercise/probe potassium signal supports conditional review. No chronic supplement co-use trial, rate of severe events or protective interval.
Factors that may matter: Exact ingredient and preparation; Kidney function and clinical indication; Concomitant medicines.
Read the supporting source summaries
Source 1: Current U.S. regulatory product labeling
dailymed.nlm.nih.gov · Source check Sep 10, 2026
Population: Patients prescribed oral nadolol.
Nadolol is not metabolized by the liver and is mainly cleared unchanged by the kidneys. Kidney function affects dosing. Bradycardia and abrupt-withdrawal precautions apply.
How this applies: Exact active-ingredient and oral-route context.
Label omission of an herb does not prove safety. No invented exact supplement interaction rate or universal spacing rule.
Source 2: Original human study
pubmed.ncbi.nlm.nih.gov · Source check Sep 10, 2026
Population: Eight healthy volunteers in a randomized crossover.
Nadolol increased exercise-associated serum potassium and blunted beta2 responses.
How this applies: Exact-drug physiologic basis for conditional potassium review.
Acute exercise/probe experiment, not chronic oral-potassium co-use or a rare-event rate.
Research assessment: · Open full citations ↗
Review and change history
- Publication status
- Published research summary
- Clinical review
- Not yet recorded
| Date | Update |
|---|---|
| Article prepared | |
| Initial source-checked research draft with exact preparation limits, contrary findings and source-access details. Clinical review not recorded. | |
| Research summary published |
Article revision: 0ae12206b7dda711
This guide brings together the evidence records used by our interaction checker. Each finding retains its own preparation limits, research date, and source summaries.
Full citations require verification. Reading this answer and the source summaries does not.
Taking other supplements or medications?
Use the checker to explore your other combinations. Ask a pharmacist to review the exact products, amounts and medical conditions in your complete list.
Open the interaction checkerInformation, not medical advice. Do not change prescribed treatment based on this guide.