Drug & supplement interaction

Potassium + Atezolizumab

Atezolizumab brand name: Tecentriq.

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 Atezolizumab 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 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 Atezolizumab

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 Atezolizumab 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 Atezolizumab and Potassium? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Atezolizumab

Interactions in our licensed database are recorded against drug classes, not just single drug names. Atezolizumab is filed under 2 classifications — antineoplastics, immunosuppressants. 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 Atezolizumab’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 — Atezolizumab 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. Atezolizumab)
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 Atezolizumab 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. 3 of them are worth acting on rather than waiting out — marked below.

  • High potassium / An irregular heartbeat Worth acting on 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.

    Atezolizumab

    Listed in the ADVERSE REACTIONS section of the FDA label for Atezolizumab. Read the label on DailyMed ›

  • Bleeding or bruising Worth acting on 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.

    Atezolizumab

    Listed in the ADVERSE REACTIONS section of the FDA label for Atezolizumab. Read the label on DailyMed ›

  • Numbness or tingling 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.

    Atezolizumab

    Listed in the ADVERSE REACTIONS section of the FDA label for Atezolizumab. Read the label on DailyMed ›

  • Stomach pain / Diarrhea / Vomiting / Nausea Additional detail

    Potassium

    Recorded for Potassium in the same Natural Medicines adverse-effect record shown under High potassium / An irregular heartbeat above.

    Atezolizumab

    Listed in the ADVERSE REACTIONS section of the FDA label for Atezolizumab. Read the label on DailyMed ›

Reported for Potassium but not commonly for Atezolizumab: confusion, low blood pressure, bloating or gas and dizziness.

Effects for Atezolizumab come from the ADVERSE REACTIONS section of its FDA label; effects for Potassium come from the Natural Medicines adverse-effect record, quoted above. 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

From our Q&A

Questions About Potassium or Atezolizumab

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 Atezolizumab, 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 Atezolizumab

This page covers Potassium only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Atezolizumab page lists 54 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Active Hexose Correlated Compound (ahcc) (moderate), Alfalfa (moderate), American Ginseng (moderate), Andrographis (moderate) and Ashwagandha (moderate).

By severity: 52 moderate · 2 minor.

From our pharmacist’s overview on the Atezolizumab page

“Atezolizumab (Tecentriq) is cancer immunotherapy, a drug designed to release the brakes on your own immune system so it can attack tumors. That mechanism explains why nearly every one of the 54 supplements and herbs on this page made the list: 53 are flagged because they appear to stimulate immune activity, based mostly on lab and anim…”

Reviewed by 2 · Jul 18, 2026

Open the Atezolizumab 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 Atezolizumab, 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 Atezolizumab 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 1%

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

29 days ago today
Medication Atezolizumab
Top 25%

#588 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 Atezolizumab 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 Atezolizumab Injection

What Is Atezolizumab Injection Used For?

Brand name: Tecentriq

Tecentriq (atezolizumab) is used to treat a range of cancers in adults. It can be used alone or combined with other cancer medicines depending on the cancer type and stage. Approved uses include non-small cell lung cancer (NSCLC) — both after surgery and in metastatic (spread) disease — extensive-stage small cell lung cancer (ES-SCLC), unresectable or metastatic hepatocellular carcinoma (liver cancer), BRAF V600 mutation-positive melanoma, and muscle invasive bladder cancer after surgery.

Tecentriq is also approved — as a single agent — for adult and pediatric patients aged 2 and older with unresectable or metastatic alveolar soft part sarcoma (ASPS), a rare soft tissue cancer. Several of these uses require tumor testing (such as PD-L1 expression or specific gene mutations) before Tecentriq is selected as treatment.

See full Atezolizumab Injection 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 Atezolizumab, 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 Atezolizumab Together: Common Questions

Is it safe to take Potassium with Atezolizumab?
We do not list a known interaction between Potassium and Atezolizumab. 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 Atezolizumab 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.
How was the Potassium and Atezolizumab combination checked?
Interactions in our licensed database are recorded against drug classes. Atezolizumab is filed under 2 classifications, and Potassium has documented interactions with 3 drug classes — none of Atezolizumab'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 — Atezolizumab 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 Atezolizumab interact with any supplements?
Yes. Atezolizumab has documented interactions with 54 supplements in our database — Potassium is not one of them. The Atezolizumab 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 Atezolizumab Injection drug information The full plain-English guide to this medication Atezolizumab supplement interactions Every supplement checked against Atezolizumab, 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 Atezolizumab 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.