Drug & supplement interaction

Trailing Arbutus + Pralsetinib

Pralsetinib brand name: Gavreto.

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 Trailing Arbutus and Pralsetinib 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 Pralsetinib 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

Trailing Arbutus and Pralsetinib

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 Pralsetinib and Trailing Arbutus 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 Trailing Arbutus at all — not against Pralsetinib, 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.

Trailing Arbutus safety at a glance

Trailing Arbutus overall Not established There is very little human research, so its safety is not well established.
Pregnancy Avoid No reliable safety data exist, so avoid use during pregnancy.
Breastfeeding Avoid No reliable safety data exist, so avoid use while breastfeeding.

Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Pralsetinib and Trailing Arbutus? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

No Interaction Found — But Data Suggests Trailing Arbutus and Pralsetinib 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. 4 of them are worth acting on rather than waiting out — marked below.

  • Anemia / Seizures / Liver problems / Bleeding or bruising Worth acting on reported in 5.5% of FDA reports for Pralsetinib Additional detail

    Trailing Arbutus

    “Orally, chronic use of trailing arbutus may lead to hydroquinone toxicity. Symptoms of toxicity include tinnitus, vomiting, delirium, convulsions, and collapse (11). Liver damage, cachexia, hemolytic anemia, and hair depigmentation may also occur with long term use (18).”

    Trailing Arbutus · Natural Medicines adverse-effect record, reported in anemia.

    2 sources cited
    1. 11. Leung AY, Foster S. Encyclopedia of Common Natural Ingredients Used in Food, Drugs and Cosmetics. 2nd ed. New York, NY: John Wiley & Sons, 1996.
    2. 18. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.

    Pralsetinib

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

  • Vomiting Additional detail

    Trailing Arbutus

    Recorded for Trailing Arbutus in the same Natural Medicines adverse-effect record shown under Anemia / Seizures / Liver problems / Bleeding or bruising above.

    Pralsetinib

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

Reported for Trailing Arbutus but not commonly for Pralsetinib: pain or burning when passing urine, confusion and ringing in the ears.

Effects for Pralsetinib come from the ADVERSE REACTIONS section of its FDA label; effects for Trailing Arbutus come from the Natural Medicines adverse-effect record, quoted above. Where a percentage is shown, it is the share of 1,699 voluntary FDA FAERS reports for Pralsetinib 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.

How to take them

Some Pralsetinib Products Have a Food Rule — Trailing Arbutus Should Not Break It

At least one FDA label for a product containing Pralsetinib says to take it on an empty stomach. Most supplements — Trailing Arbutus included — are taken with a meal, so the easy mistake is swallowing both together at breakfast. Where that rule applies, keep Pralsetinib on its own and move Trailing Arbutus to a meal later in the day.

This may not be true of your version. Food instructions belong to the product, not the ingredient: two Pralsetinib 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.

( 2.1 , 14 ) The recommended dosage in adults and pediatric patients 12 years and older is 400 mg orally once daily on an empty stomach (no food intake for at least 2 hours before and at least 1 hour after taking GAVRETO).

From the Dosage and Administration section of the FDA label we read for Pralsetinib — 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.

Everything else you take

See Every Supplement That Interacts With Pralsetinib

This page covers Trailing Arbutus only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Pralsetinib page lists 181 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: 11 major · 134 moderate · 36 minor.

From our pharmacist’s overview on the Pralsetinib page

“With pralsetinib (Gavreto), a targeted therapy for RET-driven lung and thyroid cancers, I would treat this list as required reading rather than background noise. Most of the interactions change how much of the drug the body actually gets: grapefruit can push its levels higher, while St.”

Reviewed by 2 · Jul 18, 2026

Open the Pralsetinib interaction page

One more smart check

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

We hold 12 real supplement products containing Trailing Arbutus, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Trailing Arbutus. Even though Trailing Arbutus itself has no known interaction with Pralsetinib, 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 Trailing Arbutus and Pralsetinib 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 Trailing Arbutus
Steady interest

#1,028 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Pralsetinib
Steady interest

#2,164 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 Trailing Arbutus reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Trailing Arbutus and Pralsetinib 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 Trailing Arbutus

What is Trailing Arbutus?

  • Urinary tract complaints
  • Bladder irritation
  • Kidney support (traditional)
  • Mild diuretic

Trailing Arbutus is a low-growing North American woodland plant traditionally used in folk medicine for urinary and bladder complaints. There is very little modern scientific research on its safety or effectiveness, so it cannot be recommended with confidence. Talk to your pharmacist or doctor before using it, and avoid it during pregnancy and breastfeeding.

Epigaea repens · Ericaceae · Leaves (occasionally the whole flowering plant) · Tea, tincture, dried herb

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

Trailing Arbutus: dosing

There is no established or standardized dose for Trailing Arbutus. It has not been studied enough to know a safe and effective amount, and quality of commercial products is not guaranteed.If you choose to use a product that contains it, follow the directions on the label and do not exceed them.

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

Read the full Trailing Arbutus monograph & all interactions
Medication

About Pralsetinib

What Is Pralsetinib Used For?

Brand name: Gavreto

Gavreto (pralsetinib) is used to treat adults with metastatic RET fusion-positive non-small cell lung cancer (NSCLC) — a type of lung cancer that has spread and carries a specific genetic alteration detected by an FDA-approved test.

Gavreto is also approved for adults and children aged 12 and older with advanced or metastatic RET fusion-positive thyroid cancer who need systemic (whole-body) treatment and whose cancer no longer responds to radioactive iodine (when radioactive iodine is an appropriate option). This thyroid cancer use is under accelerated approval, meaning continued approval depends on results from confirmatory clinical trials.

Most-Reported Side Effects for Pralsetinib

From FAERS, the FDA’s public side-effect reporting system (1,788 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Product prescribing issue 181 reports
Fatigue 126 reports
Asthenia 116 reports
Anemia 98 reports
Hypertension 96 reports
See full Pralsetinib drug information
Keep checking

Other Drugs & Trailing Arbutus

Browse every other medication we’ve checked against Trailing Arbutus — 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 Trailing Arbutus 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 Trailing Arbutus list.

See the full Trailing Arbutus interactions page
See every supplement checked against Pralsetinib, ranked by severity
Evidence & sources

Trailing Arbutus References

The 2 references that drive our Trailing Arbutus 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. Leung AY, Foster S. Encyclopedia of Common Natural Ingredients Used in Food, Drugs and Cosmetics. 2nd ed. New York, NY: John Wiley & Sons, 1996.
  2. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.

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 Trailing Arbutus and Pralsetinib Together: Common Questions

Is it safe to take Trailing Arbutus with Pralsetinib?
We do not list a known interaction between Trailing Arbutus and Pralsetinib. 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 Trailing Arbutus and Pralsetinib have any of the same side effects?
Yes — our sources link each of them separately to 5 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 Trailing Arbutus and Pralsetinib at the same time of day?
At least one FDA label for a product containing Pralsetinib says to take it on an empty stomach, and supplements are usually taken with a meal — so taking them together at breakfast is the easy mistake. Where that applies, keep Pralsetinib on its own and move Trailing Arbutus to a meal later in the day. Food instructions belong to the product rather than the ingredient, so check the directions on your own box. This is about absorption, not an interaction.
Does Pralsetinib interact with any supplements?
Yes. Pralsetinib has documented interactions with 181 supplements in our database — Trailing Arbutus is not one of them. The Pralsetinib 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

Trailing Arbutus monograph Uses, safety profile, and every drug interaction in one place Pralsetinib drug information The full plain-English guide to this medication Pralsetinib supplement interactions Every supplement checked against Pralsetinib, 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 Pralsetinib and Trailing Arbutus?

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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.