Drug & supplement interaction

Potassium + Pretomanid

Pretomanid brand name: Pretomanid.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 20, 2026
The bottom line No known interaction

We found no known interaction between Potassium and Pretomanid in our sources. Absence of a documented interaction is not the same as proven safety, and does not guarantee one does not exist. Do not start, stop, or change a medication or supplement based on this page; confirm with your pharmacist or doctor first. Additionally, although there is no interaction, the label for Pretomanid states a food rule worth keeping to, and the two are separately associated with some of the same side effects, which would make a new symptom harder to attribute to one or the other.

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Interaction report

Potassium and Pretomanid

We checked these two against our interaction database. Here is what we found.

No Known Interaction Found

We did not find a documented interaction between Pretomanid and Potassium in our sources. This does not guarantee that the combination is completely free of risk — there is often limited research on supplements and herbal products, especially around drug interactions.

If you decide to take both, the practical routine is simple: add one new thing at a time and note the date you started it. If the combination is going to disagree with you, it usually shows in the first days to a couple of weeks — and a start date turns “I’ve been feeling off” into something a pharmacist can actually work with. Do not stop a prescribed medicine on your own.

Always talk with your pharmacist or doctor before making changes to your medications or supplements, particularly if you take several medications or have an ongoing health condition.

Potassium safety at a glance

Potassium overall Use caution Generally safe from food, but supplements can cause dangerously high blood levels in some people, especially those with kidney disease.
Pregnancy Likely Safe When used orally in dietary amounts of 40-80 mEq daily. A tolerable upper intake level (UL) has not been established for healthy individuals. Read the full pregnancy detail
Breastfeeding Likely Safe When used orally in dietary amounts of 40-80 mEq daily. A tolerable upper intake level (UL) has not been established for healthy individuals. Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center) — the full detail is in the Special populations card below. Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Pretomanid and Potassium? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Pretomanid

Interactions in our licensed database are recorded against drug classes, not just single drug names. Pretomanid is filed under 5 classifications — including immunosuppressants, qt interval-prolonging drugs, antibiotic drugs. Potassium has documented interactions with 3 drug classes — the most serious being ace inhibitors (aceis) (moderate), angiotensin receptor blockers (arbs) (moderate) and potassium-sparing diuretics (moderate) — and none of Pretomanid’s classifications are among them.

Classification data comes from our licensed Natural Medicines dataset. A medication can belong to classes beyond those recorded there, so this describes how the check was run — it is not a safety guarantee.

Keep it in perspective

Potassium Does Interact With Other Medications

Potassium has 62 moderate known drug interactions in our database — Pretomanid isn’t one of them. If you take anything else, check it against the full list below.

Moderate 62 No known interaction 2,768 (incl. Pretomanid)
Taking anything else?

Check Another of Your Medications Against Potassium

Covers the 2,830 medications we’ve checked against Potassium. Pick one to open its full report.

What to actually watch for

No Interaction Found — But Data Suggests Potassium and Pretomanid May Share Several of the Same Side Effects

This is not an interaction. Neither one changes how your body handles the other, and nothing here says they react together. What our sources do show is that each has separately been linked to the effects below — so taking both can make those effects more likely to turn up, and harder to pin on one or the other if they do. 2 of them are worth acting on rather than waiting out — marked below.

  • High potassium / An irregular heartbeat Worth acting on reported in 5.3% of FDA reports for Pretomanid Additional detail

    Potassium

    “Orally or intravenously, high potassium levels can cause hypotension, cardiac arrhythmias, heart block, or cardiac arrest (15,16,3385,95011,95626,95630).”

    Potassium · Natural Medicines adverse-effect record, reported in arrhythmia.

    6 sources cited
    1. 15. McEvoy GK, ed. AHFS Drug Information. Bethesda, MD: American Society of Health-System Pharmacists, 1998.
    2. 16. Gennaro A. Remington: The Science and Practice of Pharmacy. 19th ed. Lippincott: Williams & Wilkins, 1996.
    3. 3385. Whelton PK, He J, Cutler JA, et al. Effects of oral potassium on blood pressure. Meta-analysis of randomized controlled clinical trials. JAMA 1997;277:1624-32. PubMed
    4. 95011. Potassium chloride injection [package insert]. Lake Forest, IL: Hospira Inc.; 2009.
    5. 95626. Patel RB, Tannenbaum S, Viana-Tejedor A, et al. Serum potassium levels, cardiac arrhythmias, and mortality following non-ST-elevation myocardial infarction or unstable angina: insights from MERLIN-TIMI 36. Eur Heart J Acute Cardiovasc Care 2017 Feb;6(1):1 PubMed
    6. 95630. Keskin M, Kaya A, Tatlisu MA, et al. The effect of serum potassium level on in-hospital and long-term mortality in ST elevation myocardial infarction. Int J cardiol. 2016 Oct 15;221:505-10.

    Pretomanid

    Listed in the ADVERSE REACTIONS section of the FDA label for Pretomanid, and in voluntary FDA adverse-event reports. Read the label on DailyMed ›

  • Numbness or tingling / Dizziness reported in 9.9% of FDA reports for Pretomanid Additional detail

    Potassium

    “Orally or intravenously, high potassium levels can cause paresthesia, generalized weakness, flaccid paralysis, listlessness, vertigo, or mental confusion (15,16,3385,95011).”

    Potassium · Natural Medicines adverse-effect record, reported in vertigo.

    4 sources cited
    1. 15. McEvoy GK, ed. AHFS Drug Information. Bethesda, MD: American Society of Health-System Pharmacists, 1998.
    2. 16. Gennaro A. Remington: The Science and Practice of Pharmacy. 19th ed. Lippincott: Williams & Wilkins, 1996.
    3. 3385. Whelton PK, He J, Cutler JA, et al. Effects of oral potassium on blood pressure. Meta-analysis of randomized controlled clinical trials. JAMA 1997;277:1624-32. PubMed
    4. 95011. Potassium chloride injection [package insert]. Lake Forest, IL: Hospira Inc.; 2009.

    Pretomanid

    Listed in the ADVERSE REACTIONS section of the FDA label for Pretomanid, and in voluntary FDA adverse-event reports. Read the label on DailyMed ›

  • Stomach pain / Nausea / Diarrhea / Vomiting reported in 6.2% of FDA reports for Pretomanid Additional detail

    Potassium

    “Orally or intravenously, high doses of potassium can cause, nausea, vomiting, abdominal pain, diarrhea, and flatulence. Bleeding duodenal ulcers have also been associated with ingestion of slow-release potassium tablets.”

    Potassium · Natural Medicines adverse-effect record, reported in diarrhea.

    4 sources cited
    1. 95010. Potassium chloride oral solution [package insert]. Allentown, PA: Lehigh Valley Technologies, Inc.; 2014.
    2. 95011. Potassium chloride injection [package insert]. Lake Forest, IL: Hospira Inc.; 2009.
    3. 69625. Altieri, P. I., Herrero, C., Suero, R., and Ortiz, A. Bleeding duodenal ulcer in a patient taking slow-releasing potassium tablets. Bol.Asoc.Med P.R. 1977;69(8):276.
    4. 69672. Raf, L. E. Enteric-coated potassium chloride tablets and ulcer of the small intestine. Acta Chir Scand Suppl 1967;(374):1-87.

    Pretomanid

    Listed in the ADVERSE REACTIONS section of the FDA label for Pretomanid, and in voluntary FDA adverse-event reports. Read the label on DailyMed ›

Reported for Potassium but not commonly for Pretomanid: confusion, low blood pressure, bloating or gas and bleeding or bruising.

Effects for Pretomanid come from the ADVERSE REACTIONS section of its FDA label; effects for Potassium come from the Natural Medicines adverse-effect record, quoted above. Where a percentage is shown, it is the share of 647 voluntary FDA FAERS reports for Pretomanid that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Wording is matched across sources by our own clinical vocabulary, so treat this as a prompt to pay attention, not a diagnosis.

Special populations

Potassium in Pregnancy & Breastfeeding

Pregnancy And Lactation Likely Safe

When used orally in dietary amounts of 40-80 mEq daily. A tolerable upper intake level (UL) has not been established for healthy individuals.

DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.© 2026 Therapeutic Research Center

How to take them

Some Pretomanid Products Have a Food Rule — Potassium Should Not Break It

At least one FDA label for a product containing Pretomanid says to take it with food. If you take Potassium on an empty stomach out of habit, keep them separate — and take Pretomanid with a meal where the label says to.

This may not be true of your version. Food instructions belong to the product, not the ingredient: two Pretomanid products can carry different directions, and extended-release forms often differ from immediate-release ones. The label we read is quoted below — check the directions on your own box or bottle, or ask your pharmacist, for how to take the exact product you were given.

Recommended Dosage Pretomanid Tablets must be administered in combination with bedaquiline and linezolid with food [see Clinical Pharmacology (12.3) ] .

From the Dosage and Administration section of the FDA label we read for Pretomanid — where that label names a specific product, the instruction is that product's. Read the label on DailyMed ›

A food rule is not an interaction — it is about how much of the medicine you absorb. The directions that came with your own product, and your pharmacist, outrank anything on this page.

From our Q&A

Questions About Potassium or Pretomanid

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Potassium or Pretomanid, not necessarily both, but if one is close to what you were about to ask it will usually go further than a database entry can:

Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.

Everything else you take

See Every Supplement That Interacts With Pretomanid

This page covers Potassium only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Pretomanid page lists 143 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), American Hellebore (major), Arsenic (major), Beer (major) and Cesium (major).

By severity: 10 major · 122 moderate · 11 minor.

From our pharmacist’s overview on the Pretomanid page

“Pretomanid is reserved for highly drug-resistant tuberculosis, and it can stress the liver and lengthen the heart's QT interval, so the supplements on this page deserve genuine care. Ten of the 143 ingredients on file carry a major rating, and nearly all of those either compound the liver risk (alcohol in beer or wine is the plainest e…”

Reviewed by 2 · Jul 18, 2026

Open the Pretomanid interaction page

One more smart check

Taking Potassium as Part of a Dietary Supplement Product? Check It for Interactions

We hold 22,782 real supplement products containing Potassium, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Potassium. Even though Potassium itself has no known interaction with Pretomanid, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Potassium and Pretomanid Sit Against Everything Else

Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.

Supplement Potassium
Top 10

#10 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Pretomanid
Steady interest

#2,613 of 2,830 medications looked up here in the last 7 days

29 days ago today

Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.

Where does our data come from?
  • Source: the Natural Medicines (TRC Healthcare) clinical database — the evidence-graded professional reference for herb & supplement interactions.
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Potassium reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Potassium and Pretomanid records this page draws on were last updated July 10, 2026.
  • What “no known interaction” means: no documented interaction in the sources above — not a guarantee of safety. Supplements are studied far less than prescription drugs, so we say exactly what the evidence supports, and nothing more.
Data structure & sourcing designed and verified by .
Supplement

About Potassium

What is Potassium?

  • Preventing or treating low potassium (hypokalemia)
  • Supporting healthy blood pressure
  • Muscle cramps
  • Replacing losses from diuretics or vomiting/diarrhea
  • General electrolyte balance

Potassium is an essential mineral your body needs for nerve signals, muscle function, and a steady heartbeat, and most people get enough from a balanced diet rich in fruits and vegetables. Potassium supplements can help when blood levels are truly low, but too much potassium can be dangerous, especially for people with kidney problems. Always talk with your pharmacist or doctor before taking a potassium supplement.

Tablets, capsules, extended-release tablets, powders, liquids, and salt substitutes (as potassium chloride, citrate, gluconate, bicarbonate, or aspartate)

An interaction check asks whether these two react with each other — it does not ask whether Potassium is a good idea for someone in your situation. Here is what our Potassium record says about it on its own.

Potassium: dosing

There is no single "supplement dose" of potassium that fits everyone. The amount needed depends on your diet, your blood levels, your kidney function, and any medicines you take.For general health, experts recommend getting potassium primarily from food, such as bananas, potatoes, beans, leafy greens, and citrus. Over-the-counter supplements are often limited in strength because of safety concerns, and higher doses usually require a prescription and monitoring.Follow the directions on your product label and, more importantly, follow your doctor's or pharmacist's instructions. Do not start, increase, or combine potassium supplements on your own, especially if you have kidney disease or take heart or blood pressure medicines.

From our Potassium monograph — the full record covers uses, side effects and every documented interaction.

Read the full Potassium monograph & all interactions
Medication

About Pretomanid

What Is Pretomanid Used For?

Brand name: Pretomanid

Pretomanid Tablet is used only as part of a three-drug regimen — together with bedaquiline and linezolid — to treat adults with pulmonary (lung) tuberculosis that is resistant to multiple antibiotics, including isoniazid, rifamycins, a fluoroquinolone, and a second-line injectable TB drug. It is also used for adults whose TB is resistant to isoniazid and rifampin and who cannot tolerate or are not responding to standard TB therapy.

Pretomanid Tablets are not for drug-sensitive TB, latent (inactive) TB infection, TB outside the lungs, or TB that responds to standard treatment. They should only be used in combination with bedaquiline and linezolid — safety and effectiveness with other drug combinations have not been established.

See full Pretomanid drug information
Keep checking

Other Drugs & Potassium

Browse every other medication we’ve checked against Potassium — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
62Moderate
0Minor
2,767No known interaction
62 Moderate 2,767 No interaction
Moderate

62 interactions

Showing 60 of 62 moderate interactions — see all 62 on the Potassium page.

No interaction 2,767 drugs checked — show the list

We also checked Potassium against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,767 medications checked with no known interaction — see the full Potassium list.

See the full Potassium interactions page
See every supplement checked against Pretomanid, ranked by severity
Evidence & sources

Potassium References

The 12 references that drive our Potassium monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.

  1. McEvoy GK, ed. AHFS Drug Information. Bethesda, MD: American Society of Health-System Pharmacists, 1998.
  2. Gennaro A. Remington: The Science and Practice of Pharmacy. 19th ed. Lippincott: Williams & Wilkins, 1996.
  3. Whelton PK, He J, Cutler JA, et al. Effects of oral potassium on blood pressure. Meta-analysis of randomized controlled clinical trials. JAMA 1997;277:1624-32. PubMed
  4. Phillips, C. O., Kashani, A., Ko, D. K., Francis, G., and Krumholz, H. M. Adverse effects of combination angiotensin II receptor blockers plus angiotensin-converting enzyme inhibitors for left ventricular dysfunction: a quantitative review of data from ra DOI
  5. Altieri, P. I., Herrero, C., Suero, R., and Ortiz, A. Bleeding duodenal ulcer in a patient taking slow-releasing potassium tablets. Bol.Asoc.Med P.R. 1977;69(8):276.
  6. Raf, L. E. Enteric-coated potassium chloride tablets and ulcer of the small intestine. Acta Chir Scand Suppl 1967;(374):1-87.
  7. Potassium chloride oral solution [package insert]. Allentown, PA: Lehigh Valley Technologies, Inc.; 2014.
  8. Potassium chloride injection [package insert]. Lake Forest, IL: Hospira Inc.; 2009.
  9. Patel RB, Tannenbaum S, Viana-Tejedor A, et al. Serum potassium levels, cardiac arrhythmias, and mortality following non-ST-elevation myocardial infarction or unstable angina: insights from MERLIN-TIMI 36. Eur Heart J Acute Cardiovasc Care 2017 Feb;6(1):1 PubMed
  10. Malta D, Arcand J, Ravindran A, Floras V, Allard JP, Newton GE. Adequate intake of potassium does not cause hyperkalemia in hypertensive individuals taking medications that antagonize the renin angiotensin aldosterone system. Am J Clin Nutr 2016 Oct;104(4 PubMed
  11. Keskin M, Kaya A, Tatlisu MA, et al. The effect of serum potassium level on in-hospital and long-term mortality in ST elevation myocardial infarction. Int J cardiol. 2016 Oct 15;221:505-10.
  12. Stallings VA, Harrison M, Oria M; Committee to Review the Dietary Reference Intakes for Sodium and Potassium, Food and Nutrition Board, Health and Medicine Division, National Academies of Sciences, Engineering, and Medicine. Washington (DC): National Acad

Medication overviews come from MedlinePlus (NIH); supplement label data from the NIH Dietary Supplement Label Database. Content is written and reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

Pharmacist Counseling Corner

Taking Potassium and Pretomanid Together: Common Questions

Is it safe to take Potassium with Pretomanid?
We do not list a known interaction between Potassium and Pretomanid. That does not guarantee the combination is risk-free, so confirm with your pharmacist or doctor — especially if you take other medications or have a health condition.
Do Potassium and Pretomanid have any of the same side effects?
Yes — our sources link each of them separately to 8 of the same effects. That is not an interaction: neither changes how your body handles the other. It does mean that if one of those effects turns up, it can be harder to tell which one is behind it. They are listed on this page with the source behind each.
Should I take Potassium and Pretomanid at the same time of day?
At least one FDA label for a product containing Pretomanid says to take it with food. If you take Potassium on an empty stomach out of habit, keep them separate and take Pretomanid with a meal where the label says to. Food instructions belong to the product rather than the ingredient — two Pretomanid products can differ — so check the directions on your own box. This is about absorption, not an interaction.
How was the Potassium and Pretomanid combination checked?
Interactions in our licensed database are recorded against drug classes. Pretomanid is filed under 5 classifications, and Potassium has documented interactions with 3 drug classes — none of Pretomanid's classifications are among them. A medication can belong to classes beyond those recorded in our dataset, so this describes how the check was run rather than guaranteeing safety.
Does Potassium interact with any other medications?
Yes. Potassium has 62 documented drug interactions in our database — Pretomanid is simply not one of them. If you take anything else, it is worth checking each one; they are all listed on this page.
Does Pretomanid interact with any supplements?
Yes. Pretomanid has documented interactions with 143 supplements in our database — Potassium is not one of them. The Pretomanid interaction page linked on this page lists every one, ranked by severity.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Where next

Keep Exploring

Potassium monograph Uses, safety profile, and every drug interaction in one place Pretomanid drug information The full plain-English guide to this medication Pretomanid supplement interactions Every supplement checked against Pretomanid, ranked by severity Supplement interaction checker Check any supplement or product against your medications Browse medications A–Z Every drug we’ve checked against herbs & supplements References The 12 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Pretomanid and Potassium?

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This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.