Drug & supplement interaction

Corkwood Tree + 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 Corkwood Tree 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

Corkwood Tree 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 Corkwood Tree 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.

Corkwood Tree safety at a glance

Corkwood Tree overall Avoid The plant contains potent toxic tropane alkaloids and is not safe for self-use.
Pregnancy Likely Unsafe When used orally; avoid using. Read the full pregnancy detail
Breastfeeding Likely Unsafe When used orally; 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 Corkwood Tree? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Losartan Potassium

Interactions in our licensed database are recorded against drug classes, not just single drug names. Losartan Potassium is filed under 7 classifications — including angiotensin receptor blockers (arbs), cytochrome p450 2c9 (cyp2c9) substrates, antihypertensive drugs. Corkwood Tree has documented interactions with 1 drug class — the most serious being anticholinergic drugs (moderate) — and none of Losartan Potassium’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

Corkwood Tree Does Interact With Other Medications

Corkwood Tree has 195 moderate known drug interactions in our database — Losartan Potassium isn’t one of them. If you take anything else, check it against the full list below.

Moderate 195 No known interaction 2,635 (incl. Losartan Potassium)
Taking anything else?

Check Another of Your Medications Against Corkwood Tree

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

What to actually watch for

No Interaction Found — But Data Suggests Corkwood Tree 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. One of them is worth acting on rather than waiting out — marked below.

  • Raised blood pressure Worth acting on Additional detail

    Corkwood Tree

    “Orally, corkwood tree leaves can cause hypertension and tachycardia. In one case, a 22-year-old male presented with hypertension and tachycardia, among other symptoms, after ingesting 5-10 corkwood tree leaves. Alkaloid constituents in corkwood tree, namely scopolamine and atropine, have anticholinergic effects, which likely explains these adverse cardiovascular effects.”

    Corkwood Tree · Natural Medicines adverse-effect record, reported in hypertension.

    1 source cited
    1. 106659. Pellowe E, Poncia HD. Duboisia ingestion: an unusual cause of anticholinergic poisoning. Emerg Med Australas 2013;25(3):268-70.

    Losartan Potassium

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

  • A fast or pounding heartbeat Additional detail

    Corkwood Tree

    “Orally, corkwood tree leaves are generally regarded as unsafe. Any benefits of therapy may not outweigh the risk of toxicity.

    Most Common Adverse Effects:

    Orally: Ingestion of corkwood leaves can cause poisoning. Symptoms of corkwood tree poisoning are consistent with anticholinergic toxicity. Predominant symptoms include agitation, delirium, dry mouth, flushing, hallucinations, mydriasis, and tachycardia.”

    Corkwood Tree · Natural Medicines adverse-effect record, reported in dry mouth.

    Losartan Potassium

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

Reported for Corkwood Tree but not commonly for Losartan Potassium: hallucinations, trouble passing urine, dry mouth and anxiety or restlessness.

Effects for Losartan Potassium come from the ADVERSE REACTIONS section of its FDA label; effects for Corkwood Tree 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

Corkwood Tree in Pregnancy & Breastfeeding

Pregnancy And Lactation Likely Unsafe

When used orally; 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 Corkwood Tree 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 Corkwood Tree 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 Corkwood Tree 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

How much people look this up

Where Corkwood Tree 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 Corkwood Tree
Steady interest

#1,088 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Losartan Potassium
Top 10

#9 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 Corkwood Tree reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Corkwood Tree and Losartan Potassium 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 Corkwood Tree

What is Corkwood Tree?

  • Source of scopolamine and hyoscyamine alkaloids
  • Traditional use as a stimulant or for fatigue
  • Historic use for motion sickness (via its alkaloids)
  • Antispasmodic / smooth muscle effects

Corkwood Tree (Duboisia myoporoides) is an Australian plant best known as a commercial source of powerful tropane alkaloids like scopolamine and hyoscyamine, not as a safe home remedy. The raw plant is highly toxic and should not be used as a dietary supplement; only purified, medically prescribed alkaloids derived from it should be used, and only under a doctor's care.

Duboisia myoporoides · Solanaceae · Leaves · Not commonly sold as a consumer supplement; historically a source of plant extracts and isolated alkaloids

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

Corkwood Tree: dosing

There is no safe established dose of Corkwood Tree leaf for self-use, and it should not be taken as a supplement. The only appropriate use of compounds from this plant is in standardized, prescription medicines (such as scopolamine or hyoscyamine) that are dosed and monitored by healthcare professionals.If you have been given a medicine derived from this plant, follow the product label and your prescriber's directions exactly. Do not attempt to make or use any homemade preparation.

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

Read the full Corkwood Tree 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 & Corkwood Tree

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

0Major
195Moderate
0Minor
2,634No known interaction
195 Moderate 2,634 No interaction
Moderate

195 interactions

Showing 60 of 195 moderate interactions — see all 195 on the Corkwood Tree page.

No interaction 2,634 drugs checked — show the list

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

Showing the 60 most looked-up of 2,634 medications checked with no known interaction — see the full Corkwood Tree list.

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

Corkwood Tree References

The 2 references that drive our Corkwood Tree 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. Pellowe E, Poncia HD. Duboisia ingestion: an unusual cause of anticholinergic poisoning. Emerg Med Australas 2013;25(3):268-70.

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 Corkwood Tree and Losartan Potassium Together: Common Questions

Is it safe to take Corkwood Tree with Losartan Potassium?
We do not list a known interaction between Corkwood Tree 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 Corkwood Tree and Losartan Potassium have any of the same side effects?
Yes — our sources link each of them separately to 2 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 Corkwood Tree and Losartan Potassium combination checked?
Interactions in our licensed database are recorded against drug classes. Losartan Potassium is filed under 7 classifications, and Corkwood Tree has documented interactions with 1 drug class — none of Losartan Potassium'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 Corkwood Tree interact with any other medications?
Yes. Corkwood Tree has 195 documented drug interactions in our database — Losartan Potassium 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 Losartan Potassium interact with any supplements?
Yes. Losartan Potassium has documented interactions with 253 supplements in our database — Corkwood Tree 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

Corkwood Tree 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 2 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Losartan Potassium and Corkwood Tree?

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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.