Drug & supplement interaction

White Hellebore + Losartan Potassium

Losartan Potassium brand name: Cozaar.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 13, 2026
The bottom line No known interaction

We found no known interaction between White Hellebore and Losartan Potassium 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

White Hellebore and Losartan Potassium

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 Losartan Potassium and White Hellebore 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.

Worth understanding: our licensed dataset holds no drug-interaction record for White Hellebore at all — not against Losartan Potassium, and not against any other medication we track. This verdict therefore rests on the absence of any recorded data, not on research that looked at this combination and found nothing. We cannot rule an interaction out.

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.

White Hellebore safety at a glance

White Hellebore overall Avoid The plant is highly poisonous and can cause life-threatening heart and nerve problems.
Pregnancy Likely Unsafe When used orally or topically because it could be teratogenic; avoid using. Read the full pregnancy detail
Breastfeeding Likely Unsafe When used orally or topically; avoid using. 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 Losartan Potassium and White Hellebore? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

No Interaction Found — But Data Suggests White Hellebore and Losartan Potassium 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.

  • Muscle weakness Worth acting on Additional detail

    White Hellebore

    “Orally and topically, white hellebore is generally regarded as unsafe for any use. Any benefits of therapy do not outweigh the risk of toxicity.

    Most Common Adverse Effects:

    Orally: Abdominal pain, blurred vision, bradycardia, confusion, headache, hypotension, nausea, muscle weakness, vomiting.

    Topically: Skin irritation.

    Serious Adverse Effects (Rare):

    Orally: Arrythmias, blindness, gastric erosion, loss of consciou…”

    White Hellebore · Natural Medicines adverse-effect record, reported in cluster headache.

    Losartan Potassium

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

  • Fainting Worth acting on Additional detail

    White Hellebore

    “Orally, white hellebore is toxic and can cause vertigo, confusion, numbness, headache, paresthesia, seizures, loss of consciousness, and shock.”

    White Hellebore · Natural Medicines adverse-effect record, reported in cluster headache.

    3 sources cited
    1. 553. Jaspersen-Schib R, Theus L, Guirguis-Oeschger M, et al. [Serious plant poisonings in Switzerland 1966-1994. Case analysis from the Swiss Toxicology Information Center]. Schweiz Med Wochenschr 1996;126:1085-98.
    2. 101431. Gilotta I, Brvar M. Accidental poisoning with Veratrum album mistaken for wild garlic (Allium ursinum). Clin Toxicol (Phila). 2010;48(9):949-52.
    3. 95893. Rauber-Lüthy C, Halbsguth U, Kupferschmidt H, et al. Low-dose exposure to Veratrum album in children causes mild effects--a case series. Clin Toxicol (Phila). 2010;48(3):234-7.

    Losartan Potassium

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

  • A stuffy or runny nose Additional detail

    White Hellebore

    “Orally, white hellebore is toxic and can cause respiratory depression in large doses (6,101431).

    By inhalation, the powdered root induces violent sneezing and runny nose (6).”

    White Hellebore · Natural Medicines adverse-effect record, reported in depression.

    2 sources cited
    1. 6. The Review of Natural Products by Facts and Comparisons. St. Louis, MO: Wolters Kluwer Co., 1999.
    2. 101431. Gilotta I, Brvar M. Accidental poisoning with Veratrum album mistaken for wild garlic (Allium ursinum). Clin Toxicol (Phila). 2010;48(9):949-52.

    Losartan Potassium

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

  • Numbness or tingling / Dizziness reported in 4.9% of FDA reports for Losartan Potassium Additional detail

    White Hellebore

    Recorded for White Hellebore in the same Natural Medicines adverse-effect record shown under Fainting above.

    Losartan Potassium

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

  • Low blood pressure Additional detail

    White Hellebore

    “Orally, white hellebore can cause bradycardia, and hypotension. Large doses of white hellebore can cause more severe bradycardia and hypotension and even cardiac arrythmias (6,553,95892,95893,101431,109467,115960).”

    White Hellebore · Natural Medicines adverse-effect record, reported in hypotension.

    6 sources cited
    1. 6. The Review of Natural Products by Facts and Comparisons. St. Louis, MO: Wolters Kluwer Co., 1999.
    2. 553. Jaspersen-Schib R, Theus L, Guirguis-Oeschger M, et al. [Serious plant poisonings in Switzerland 1966-1994. Case analysis from the Swiss Toxicology Information Center]. Schweiz Med Wochenschr 1996;126:1085-98.
    3. 95892. Grobosch T, Binscheck T, Martens F, Lampe D. Accidental intoxication with Veratrum album. J Anal Toxicol. 2008;32(9):768-73. PubMed
    4. 95893. Rauber-Lüthy C, Halbsguth U, Kupferschmidt H, et al. Low-dose exposure to Veratrum album in children causes mild effects--a case series. Clin Toxicol (Phila). 2010;48(3):234-7.
    5. 101431. Gilotta I, Brvar M. Accidental poisoning with Veratrum album mistaken for wild garlic (Allium ursinum). Clin Toxicol (Phila). 2010;48(9):949-52.
    6. 109467. Melnik EV, Belova MV, Potskhveriya MM, Simonova AY, Tyurin IA, Ramenskaya GV. Veratrum alkaloid determination in four cases of Veratrum aqua poisonings. J Anal Toxicol 2022;46(1):e42-e47.

    Losartan Potassium

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

  • Stomach pain / Nausea / Vomiting reported in 5.9% of FDA reports for Losartan Potassium Additional detail

    White Hellebore

    “Orally, white hellebore is toxic and usually causes nausea, vomiting, and abdominal pain. Symptoms occur 15-30 minutes after ingestion. White hellebore can also cause a burning sensation in the upper abdomen, hypersalivation, and gastric erosion (6,553).”

    White Hellebore · Natural Medicines adverse-effect record, reported in nausea and vomiting.

    6 sources cited
    1. 553. Jaspersen-Schib R, Theus L, Guirguis-Oeschger M, et al. [Serious plant poisonings in Switzerland 1966-1994. Case analysis from the Swiss Toxicology Information Center]. Schweiz Med Wochenschr 1996;126:1085-98.
    2. 95893. Rauber-Lüthy C, Halbsguth U, Kupferschmidt H, et al. Low-dose exposure to Veratrum album in children causes mild effects--a case series. Clin Toxicol (Phila). 2010;48(3):234-7.
    3. 101431. Gilotta I, Brvar M. Accidental poisoning with Veratrum album mistaken for wild garlic (Allium ursinum). Clin Toxicol (Phila). 2010;48(9):949-52.
    4. 109467. Melnik EV, Belova MV, Potskhveriya MM, Simonova AY, Tyurin IA, Ramenskaya GV. Veratrum alkaloid determination in four cases of Veratrum aqua poisonings. J Anal Toxicol 2022;46(1):e42-e47.
    5. 115960. Taldaev A, Terekhov RP, Melnik EV, et al. Insights into the Cardiotoxic Effects of Veratrum Lobelianum Alkaloids: Pilot Study. Toxins (Basel) 2022;14(7):490. PubMed
    6. 6. The Review of Natural Products by Facts and Comparisons. St. Louis, MO: Wolters Kluwer Co., 1999.

    Losartan Potassium

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

  • Headache reported in 4.8% of FDA reports for Losartan Potassium Additional detail

    White Hellebore

    Recorded for White Hellebore in the same Natural Medicines adverse-effect record shown under Muscle weakness above.

    Losartan Potassium

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

Reported for White Hellebore but not commonly for Losartan Potassium: blurred vision, a slow heartbeat, confusion and loss of vision.

Effects for Losartan Potassium come from the ADVERSE REACTIONS section of its FDA label; effects for White Hellebore come from the Natural Medicines adverse-effect record, quoted above. Where a percentage is shown, it is the share of 89,498 voluntary FDA FAERS reports for Losartan Potassium 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

White Hellebore in Pregnancy & Breastfeeding

Pregnancy Likely Unsafe

When used orally or topically because it could be teratogenic; avoid using.

Lactation Likely Unsafe

When used orally or topically; avoid using.

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 White Hellebore or Losartan Potassium

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers White Hellebore or Losartan Potassium, 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 Losartan Potassium

This page covers White Hellebore only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Losartan Potassium page lists 253 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), American Hellebore (major), American Mistletoe (major), Grapefruit (major) and St. John's Wort (major).

By severity: 6 major · 205 moderate · 42 minor.

From our pharmacist’s overview on the Losartan Potassium page

“Losartan potassium (Cozaar) treats high blood pressure, and this is a list to respect, because six of its 253 supplement interactions carry a major rating. Most entries do one of two things.”

Reviewed by 2 · Jul 18, 2026

Open the Losartan Potassium interaction page

One more smart check

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

We hold 2 real supplement products containing White Hellebore, each one broken down to its full ingredient list — and combination products often carry several ingredients besides White Hellebore. Even though White Hellebore itself has no known interaction with Losartan Potassium, 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 White Hellebore and Losartan Potassium 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 White Hellebore
Steady interest

#1,052 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Losartan Potassium
Top 10

#6 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 White Hellebore reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The White Hellebore and Losartan Potassium records this page draws on were last updated July 11, 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 White Hellebore

What is White Hellebore?

  • Homeopathic remedy for nausea and diarrhea
  • Traditional use for high blood pressure (historical)
  • Folk use as an emetic
  • Insecticide and pesticide use
  • Topical preparations for skin and lice (historical)

White Hellebore (Veratrum album) is a highly toxic plant that contains powerful compounds that can dangerously affect the heart and nervous system. It is not a safe dietary supplement, and the only forms with any history of safe human use are extremely dilute homeopathic preparations. Do not consume any raw or concentrated form of this plant.

Veratrum album · Melanthiaceae · Roots and rhizomes (historically); occasional use of dried plant material · Historically used in homeopathic dilutions and topical preparations; rarely sold as a modern supplement

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

White Hellebore: dosing

There is no established safe dose of White Hellebore for use as a supplement, and we do not recommend taking it. The plant is toxic, and the margin between any traditional "dose" and a poisonous one is very small.The only forms with a history of human use are extremely dilute homeopathic preparations, which contain little or no measurable plant material.

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

Read the full White Hellebore monograph & all interactions
Medication

About Losartan

What Is Losartan Used For?

Brand name: Cozaar

Losartan tablets — available as branded Cozaar and several generic products — are used to treat high blood pressure (hypertension) in adults and children 6 years and older. Lowering blood pressure reduces the risk of strokes and heart attacks. Losartan tablets are also used to reduce the risk of stroke in people with high blood pressure who also have left ventricular hypertrophy (an enlarged left side of the heart). Note: evidence suggests this stroke-risk benefit may not apply to Black patients.

Losartan tablets are additionally approved to protect the kidneys in people with type 2 diabetes, high blood pressure, and signs of kidney damage (diabetic nephropathy). Arbli, the oral suspension form, shares these same approved uses.

Most-Reported Side Effects for Losartan Potassium

From FAERS, the FDA’s public side-effect reporting system (89,498 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Fatigue 6,464 reports
Nausea 5,301 reports
Diarrhea 5,184 reports
Dyspnea 4,689 reports
Dizziness 4,429 reports
See full Losartan drug information
Keep checking

Other Drugs & White Hellebore

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

0Major
0Moderate
0Minor
2,829No known interaction
2,829 No interaction
No interaction 2,829 drugs checked — show the list

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

Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full White Hellebore list.

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

White Hellebore References

The 8 references that drive our White Hellebore 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. The Review of Natural Products by Facts and Comparisons. St. Louis, MO: Wolters Kluwer Co., 1999.
  2. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
  3. Jaspersen-Schib R, Theus L, Guirguis-Oeschger M, et al. [Serious plant poisonings in Switzerland 1966-1994. Case analysis from the Swiss Toxicology Information Center]. Schweiz Med Wochenschr 1996;126:1085-98.
  4. Grobosch T, Binscheck T, Martens F, Lampe D. Accidental intoxication with Veratrum album. J Anal Toxicol. 2008;32(9):768-73. PubMed
  5. Rauber-Lüthy C, Halbsguth U, Kupferschmidt H, et al. Low-dose exposure to Veratrum album in children causes mild effects--a case series. Clin Toxicol (Phila). 2010;48(3):234-7.
  6. Gilotta I, Brvar M. Accidental poisoning with Veratrum album mistaken for wild garlic (Allium ursinum). Clin Toxicol (Phila). 2010;48(9):949-52.
  7. Melnik EV, Belova MV, Potskhveriya MM, Simonova AY, Tyurin IA, Ramenskaya GV. Veratrum alkaloid determination in four cases of Veratrum aqua poisonings. J Anal Toxicol 2022;46(1):e42-e47.
  8. Taldaev A, Terekhov RP, Melnik EV, et al. Insights into the Cardiotoxic Effects of Veratrum Lobelianum Alkaloids: Pilot Study. Toxins (Basel) 2022;14(7):490. PubMed

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 White Hellebore and Losartan Potassium Together: Common Questions

Is it safe to take White Hellebore with Losartan Potassium?
We do not list a known interaction between White Hellebore and Losartan Potassium. 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 White Hellebore and Losartan Potassium have any of the same side effects?
Yes — our sources link each of them separately to 10 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.
Does Losartan Potassium interact with any supplements?
Yes. Losartan Potassium has documented interactions with 253 supplements in our database — White Hellebore is not one of them. The Losartan Potassium 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

White Hellebore monograph Uses, safety profile, and every drug interaction in one place Losartan drug information The full plain-English guide to this medication Losartan Potassium supplement interactions Every supplement checked against Losartan Potassium, 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 8 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Losartan Potassium and White Hellebore?

Our pharmacists answer your medication & supplement questions — free.

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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.