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Dietary supplement

Pau D'Arco Ingredients & Drug Interactions

by L.A. Naturals

Pau D'Arco label
See full label image
Liquid Category: Botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 30, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Pau D'Arco against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Moderate

Pau D'Arco is a dietary supplement by L.A. Naturals with 1 active ingredient. Its ingredients are commonly taken for infections (bacterial, fungal, yeast), inflammation, immune support.Based on those ingredients, 122 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are selectively imported Pau d'Arco. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Pau D'Arco by L.A. Naturals

Ask about any prescription or over-the-counter medication and we check it for interactions with Pau D'Arco by L.A. Naturals — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Pau D'Arco by L.A. Naturals

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Sep 3, 2026

What’s inside

Low disclosure
Ingredient Transparency · database check
Low

Most active ingredients don't disclose an individual amount — you can't tell how much of each you're getting.

Why this rating?
  • The label discloses an exact amount for 0 of its 1 active ingredient.

This product contains one active ingredient: selectively imported pau d'arco, a tree bark traditionally used in herbal medicine. It's formulated as a liquid with grain alcohol and deionized water as inactive ingredients.

Does it work?

Couldn't assess
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Not assessable

This is a single-ingredient Pau D'arco product and its label doesn't state a use — see Pau D'arco's own graded uses on its monograph.

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.

The evidence for pau d'arco isn't established in the data we hold. It's been studied for cancer, peptic ulcers, wound healing, and menstrual cramping, but the current research is insufficient to reliably rate whether it works for any of these uses.

The evidence, ingredient by ingredient Pau D'arco

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Pau d'arco is generally well tolerated at typical doses, but the safety data available is limited. At higher doses — specifically when the lapachol constituent exceeds 1.5 grams daily — it may cause anemia, increased bleeding risk, severe nausea, vomiting, and diarrhea.

The safety data advises against use during pregnancy due to possible harm to the developing baby. There isn't enough data to know whether it's safe while breastfeeding, so talk with your doctor or pharmacist before taking it if you're nursing.

Side effects, ingredient by ingredient Pau D'arco

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Pau D'arco.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs.
  • For scale: 122 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

If you take blood thinners or antiplatelet drugs — including prescription anticoagulants like warfarin or apixaban, or over-the-counter aspirin — check your exact medications before taking pau d'arco. The moderate interaction risk could increase your bleeding risk.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFormula with limited ingredient disclosure with no assessable stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

Pau d'arco may be worth considering if you're interested in traditional herbal support, but the evidence for its effectiveness isn't established yet. If you take any blood thinners or antiplatelet medications, check with your doctor or pharmacist before starting — the moderate interaction risk means you may need to adjust timing or avoid it altogether.

Pregnant and breastfeeding individuals should talk it over with their healthcare provider first.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Jul 25, 2014.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about Pau D'Arco, straight from the product label.

Brand L.A. Naturals
Barcode (UPC) 641356043817
Net contents 1 fl. Oz.; 30 mL
Market status On market
Date entered into DSLD Jul 25, 2014
DSLD ID 35127
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Kosher
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Pau D'Arco by L.A. Naturals, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
1 mL
Maximum serving Sizes:
2 mL
Servings per container
30
UPC/BARCODE
641356043817
IngredientAmount% DV
selectively imported Pau d'Arco0 NP--

Other ingredients: Grain Alcohol, deionized Water

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Suggested/Recommended/Usage/Directions

SUGGESTED USE: 30-60 drops in water or juice, 2-3 times daily, or as needed.

Shake well before using.

Precautions

WARNING: Keep out of the reach of children.

General Statements

Plant # K-0001604

MADE IN THE USA

FAST ABSORPTION MEDICINAL BOTANICALS SINGLE HERB IN ALCOHOL

supports healthy intestinal ecology

333 mg Herb Weight Equivalence

Herb Strength Ratio 1:3

FDA Disclaimer Statement

These statements have not been evaluated by the FDA. This product is not intended to diagnose, cure, treat, or prevent any disease.

Seals/Symbols

L.a.(TM)

K PARVE

FDA Statement of Identity

DIETARY SUPPLEMENT

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

Pau D'Arco by L.A. Naturals label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

Pau D'Arco label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in Pau D'Arco by L.A. Naturals

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size1 mL Dosage formLiquid Servings per container30 Amounts shown are per serving.

Selectively imported Pau d'Arco

Interacts with
122 drugs
0 NP per serving

Pau d'arco is a South American tree bark traditionally used for infections and inflammation, and it contains compounds like lapachol that show activit...

Selectively imported Pau d'Arco monograph & interactions

Other (inactive) ingredients: Grain Alcohol, Deionized Water. These complete the product’s ingredient list but are not active constituents.

Interaction report

Pau D'Arco by L.A. Naturals Drug Interactions

Want to check YOUR meds against Pau D'Arco?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

 Go to the checker
122Drugs
122 Moderate

Ingredients driving the most interactions

selectively imported Pau d'Arco 122

Individual Drug Interactions

The ingredients in Pau D'Arco interact with 122 drugs. Click any drug to see the details.

1 of the 1 ingredient in Pau D'Arco interact with drugs. Each result below shows which ingredient is responsible. selectively imported Pau d'Arco

Each ingredient & the kinds of drugs it affects

For each ingredient in Pau D'Arco with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.

selectively imported Pau d'Arco1 drug type · 122 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, pau d'arco might increase the risk of bleeding when taken with anticoagulant or antiplatelet drugs.
In vitro research shows that pau d'arco reduces platelet aggregation and may interfere with vitamin K. One clinical study shows that taking the lapachol constituent of pau d'arco in doses above 1.5 grams daily increases the risk of bleeding. The effects of whole pau d'arco or pau d'arco extract in humans are unclear.

Likelihood Possible Evidence D
selectively imported Pau d'Arco full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Pau D'Arco, from the product label.

L.A. Naturals

See all L.A. Naturals products
Name
Palko Services
Street Address
4991 W. US Hwy 20
City
Michigan City
State
IN
ZipCode
46360
Pharmacist Counseling Corner

Pau D'Arco by L.A. Naturals: Common Questions

Does Pau D'Arco by L.A. Naturals interact with any medications?
Yes. Based on its ingredients, Pau D'Arco has a known interaction with 122 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Pau D'Arco contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Can I take this while pregnant?
No. The safety data advises against pau d'arco during pregnancy because of possible harm to the developing baby and limited safety information. Talk with your doctor or pharmacist for personalized advice.
Can I breastfeed while taking pau d'arco?
There isn't enough data to know whether it's safe while breastfeeding. Talk with your doctor or pharmacist before taking it if you're nursing.
Does pau d'arco actually work for cancer or wound healing?
The current evidence isn't strong enough to say either way. It's been studied for both, but we don't have reliable data to confirm it works for these uses.
What side effects should I watch for?
At typical doses, side effects are uncommon. But at higher doses — when the lapachol constituent goes above 1.5 grams daily — it may cause severe nausea, vomiting, diarrhea, anemia, and increased bleeding risk.
Is this safe to take long-term?
The safety data available is limited, especially for long-term use. Stick to recommended doses and talk with your pharmacist or doctor if you're planning to take it for an extended period.

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

Not sure if Pau D'Arco is safe with your meds?

Our pharmacists answer your medication & supplement questions — free.

Ask a pharmacist

Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

Pau D'Arco label
Go deeper

The Full Monographs Behind Pau D'Arco’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Pau D'arco

Interacts with 122 drugs

Pau d'arco is a South American tree bark traditionally used for infections and inflammation, and it contains compounds like lapachol that show activity in lab studies. However, strong human...

Read the full Pau D'arco monograph →
Sources

Sources & How We Checked

Pau D'Arco's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

The 6 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Pau D'arco 6 references
  1. Gómez Castellanos JR, Prieto JM, Heinrich M. Red Lapacho (Tabebuia impetiginosa)--a global ethnopharmacological commodity? J Ethnopharmacol 2009;121:1-13. PubMed
  2. Guerra, Mde O., Mazoni, A. S., Brandao, M. A., and Peters, V. M. Toxicology of Lapachol in rats: embryolethality. Braz.J Biol. 2001;61(1):171-174. PubMed
  3. Felicio, A. C., Chang, C. V., Brandao, M. A., Peters, V. M., and Guerra, Mde O. Fetal growth in rats treated with lapachol. Contraception 2002;66(4):289-293. PubMed
  4. Son, D. J., Lim, Y., Park, Y. H., Chang, S. K., Yun, Y. P., Hong, J. T., Takeoka, G. R., Lee, K. G., Lee, S. E., Kim, M. R., Kim, J. H., and Park, B. S. Inhibitory effects of Tabebuia impetiginosa inner bark extract on platelet aggregation and vascular s
  5. Block JB, Serpick AA, Miller W, Wiernik PH. Early clinical studies with lapachol (NSC-11905). Cancer Chemother Rep 2. 1974;4(4):27-8.
  6. Algranti E, Mendonça EM, Ali SA, Kokron CM, Raile V. Occupational asthma caused by Ipe (Tabebuia spp) dust. J Investig Allergol Clin Immunol 2005;15(1):81-3.

See these in context on the Pau D'arco monograph →

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

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