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Dietary supplement

Uva Ursi 1,000 mg Ingredients & Drug Interactions

by Nature's Answer

Uva Ursi 1,000 mg 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 Uva Ursi 1,000 mg 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

Uva Ursi 1,000 mg is a dietary supplement by Nature's Answer with 1 active ingredient. Its ingredients are commonly taken for urinary tract infections, urinary discomfort, mild diuretic.Based on those ingredients, 803 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Uva Ursi (Arctostaphylos uva-ursi) leaf extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Uva Ursi 1,000 mg by Nature's Answer

Ask about any prescription or over-the-counter medication and we check it for interactions with Uva Ursi 1,000 mg by Nature's Answer — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Uva Ursi 1,000 mg by Nature's Answer

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 24, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

This product contains one active ingredient: uva ursi (Arctostaphylos uva-ursi) leaf extract at 1,000 mg per serving. It's a liquid formula, so it also includes vegetable glycerin, purified water, and a small amount of certified organic alcohol as inactive ingredients to carry and preserve the extract.

Does it work?

Leans against
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
Leans against

The strongest graded evidence we hold for the stated purpose leans against a benefit.

Why this rating?
  • The label markets this product for: urinary tract health support.
  • We looked for evidence on: Urinary tract infections (UTIs), urinary discomfort, kidney health.
  • The closest evidence on file: Uva Ursi is rated "Possibly Ineffective" for Urinary tract infections (UTIs) (Natural Medicines).

The evidence for uva ursi is mixed. For urinary tract infections, the data suggests it's possibly ineffective, so don't count on it as a reliable treatment.

For bronchitis and benign prostatic hyperplasia (enlarged prostate), we don't have enough reliable evidence to rate how well it works. If you're considering this for a urinary tract infection or prostate concern, talk with your doctor about whether it makes sense for you.

The evidence, ingredient by ingredient Uva Ursi

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.

Uva ursi is generally well tolerated in low doses when used short-term. The most common side effects are mild—diarrhea, nausea, stomach upset, and vomiting.

At very high doses (20 grams or more of the dried herb), rare but serious effects like convulsions, delirium, shortness of breath, and collapse have been reported, and doses of 30 grams or more may be fatal. Don't use this product during pregnancy—it may stimulate the uterus and there isn't enough safety data.

Avoid it while breastfeeding as well, since safety information is lacking.

Side effects, ingredient by ingredient Uva Ursi

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 — Uva Ursi.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: lithium.
  • For scale: 804 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.

Before taking this product, check with your doctor or pharmacist if you take medications metabolized by the liver enzymes CYP2C19 or CYP3A4, or drugs processed through glucuronidation, since uva ursi may slow their breakdown (Moderate severity). Also double-check if you take lithium or any urinary acidifying agents—both interactions are Moderate.

If you take any drug transported by P-glycoprotein, mention this product as well, though that interaction is Minor.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with graded evidence leaning against its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

Uva ursi is a liquid extract used traditionally for urinary tract support, but evidence for its effectiveness is weak to absent. The main caution is that it may interact with a large number of prescription medications by slowing how your body metabolizes certain drugs.

If you take any medications—especially for mood, heart, or kidney conditions, or lithium—check them against the interaction tool below before starting. Talk with your doctor or pharmacist before adding this to your routine.

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 May 22, 2016.

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 Uva Ursi 1,000 mg, straight from the product label.

Brand Nature's Answer
Barcode (UPC) 083000005305
Net contents 2 fl. Oz.; 60 mL
Market status On market
Date entered into DSLD May 22, 2016
DSLD ID 59311
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Kosher, Gluten Free
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 Uva Ursi 1,000 mg by Nature's Answer, 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:
1 mL
Servings per container
60
UPC/BARCODE
083000005305
IngredientAmount% DV
Uva Ursi (Arctostaphylos uva-ursi) leaf extract1000 mg--

Other ingredients: Vegetable Glycerin, purified Water, 12-15% certified organic Alcohol

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.
FDA Disclaimer Statement

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

Seals/Symbols

Gluten Free

K Parve

Bio-Chelated Cold Extraction Process

Formula

K Parve

Arctostaphylos uva-ursi

Low Alcohol

General

9297A Rev. 1114

General Statements

Since 1972

Super Concentrated 1,000 mg

Our facility is cGMP certified, organic and kosher certified.

Brand IP Statement(s)

Advanced Botanical Fingerprint

Discover Nature's Answer

Our organic alcohol extracts are produced using our cold Bio-Chelated proprietary extraction process, yielding a Holistically Balanced Advanced Botanical Fingerprint extract in the same synergistic ratios as in the plant.

2014 Nature's Answer

Formulation

Gluten-Free

FDA Statement of Identity

Herbal Supplement

Suggested/Recommended/Usage/Directions

Suggested Use: As a dietary supplement, take 1 mL (28 drops) three (3) times a day in a small amount of water. Shake well.

Precautions

Keep out of reach of children.

Warning: Do not use if pregnant or nursing.

Do not use if safety seal is damaged or missing.

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

See for yourself

Uva Ursi 1,000 mg by Nature's Answer label

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

Uva Ursi 1,000 mg 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 Uva Ursi 1,000 mg by Nature's Answer

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 container60 Amounts shown are per serving.

Uva Ursi (Arctostaphylos uva-ursi) leaf extract

Interacts with
803 drugs
1000 mg per serving

Uva ursi is a traditional herb used mainly for urinary tract infections, and its leaves contain a compound called arbutin that may have antimicrobial...

Uva Ursi (Arctostaphylos uva-ursi) leaf extract monograph & interactions

Other (inactive) ingredients: Vegetable Glycerin, Purified Water, 12-15% certified organic Alcohol. These complete the product’s ingredient list but are not active constituents.

Interaction report

Uva Ursi 1,000 mg by Nature's Answer Drug Interactions

Want to check YOUR meds against Uva Ursi 1,000 mg?

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
803Drugs
740 Moderate 63 Minor

Ingredients driving the most interactions

Uva Ursi (Arctostaphylos uva-ursi) leaf extract 803

Individual Drug Interactions

The ingredients in Uva Ursi 1,000 mg interact with 803 drugs. Click any drug to see the details.

1 of the 1 ingredient in Uva Ursi 1,000 mg interact with drugs. Each result below shows which ingredient is responsible. Uva Ursi (Arctostaphylos uva-ursi) leaf extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Uva Ursi 1,000 mg 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.

Uva Ursi (Arctostaphylos uva-ursi) leaf extract6 drug types · 803 drugs

Cytochrome P450 2C19 (Cyp2C19) Substrates

Theoretically, uva ursi may decrease the metabolism of CYP2C19 substrates.
In vitro, uva ursi appears to inhibit cytochrome CYP2C19. This effect has not been reported in humans.

Likelihood Possible Evidence D
Cytochrome P450 3A4 (Cyp3A4) Substrates

Theoretically, uva ursi may decrease the metabolism of CYP3A4 substrates.
In vitro, uva ursi appears to inhibit CYP3A4. This effect has not been reported in humans.

Likelihood Possible Evidence D
Glucuronidated Drugs

Theoretically, uva ursi may increase levels of drugs metabolized by glucuronidation.
In vitro, uva ursi extract appears to strongly inhibit UDP-glucuronosyltransferase (UGT) 1A1 (UGT1A1). However, uva ursi extract does not appear to inhibit UGT1A1 in animal models. This effect has not been reported in humans.

Likelihood Possible Evidence D
Lithium

Theoretically, uva ursi may increase lithium levels, necessitating a decrease in dose.
Uva ursi may have diuretic properties. Diuretics may increase lithium reabsorption with sodium in the proximal tubule of the kidney. Theoretically, uva ursi might reduce excretion and increase levels of lithium.

Likelihood Probable Evidence D
Urinary Acidifying Agents

Effects of uva ursi in the urinary tract may be reduced by urinary acidifying agents.
Uva ursi seems to work best in alkaline urine. Theoretically, taking uva ursi with medications known to acidify the urine may decrease any effects of uva ursi on the urinary tract.

Likelihood Possible Evidence D
P-Glycoprotein Substrates

Theoretically, uva ursi may alter the levels of drugs transported by P-glycoprotein.
In vitro, uva ursi appears to inhibit the multi-drug transporter protein, P-glycoprotein. This effect has not been reported in humans.

Likelihood Possible Evidence D
Uva Ursi (Arctostaphylos uva-ursi) leaf extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Uva Ursi 1,000 mg, from the product label.

Nature's Answer

See all Nature's Answer products
Name
Nature's Answer
City
Hauppauge
State
NY
ZipCode
11788-3943
Phone Number
(800) 439-2324
Web Address
www.naturesanswer.com
Pharmacist Counseling Corner

Uva Ursi 1,000 mg by Nature's Answer: Common Questions

Does Uva Ursi 1,000 mg by Nature's Answer interact with any medications?
Yes. Based on its ingredients, Uva Ursi 1,000 mg has a known interaction with 803 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Uva Ursi 1,000 mg 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.
Will this actually help with a urinary tract infection?
The evidence suggests uva ursi is possibly ineffective for UTIs, so it's not a reliable treatment. If you have a UTI, talk with your doctor about proven options like antibiotics instead of relying on this supplement alone.
Can I use this long-term?
No. Uva ursi is meant for short-term use only. Using it for long periods or at high doses can be toxic. Stick to short-term use as directed, and don't exceed the recommended dose.
What are the common side effects?
At normal doses, the most common side effects are mild: diarrhea, nausea, stomach upset, and vomiting. These usually happen because uva ursi can irritate your stomach. High doses are much more serious and rare.
Is it safe during pregnancy or breastfeeding?
No. Uva ursi is not safe in pregnancy—it may stimulate the uterus—and there isn't enough safety data for breastfeeding either. Avoid it during both periods.
Why does this product have 804 medication interactions?
That number comes from how many individual medications are affected by the way uva ursi may slow liver enzyme activity in humans—in particular CYP2C19 and CYP3A4 systems. Many different drugs depend on those pathways to be cleared from your body, so the total count is large. That's why it's crucial to check your exact medications before starting.

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

Not sure if Uva Ursi 1,000 mg is safe with your meds?

Our pharmacists answer your medication & supplement questions — free.

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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.

Uva Ursi 1,000 mg label
Go deeper

The Full Monographs Behind Uva Ursi 1,000 mg’s Ingredients

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

Herb & supplement monograph

Uva Ursi

Interacts with 803 drugs

Uva ursi is a traditional herb used mainly for urinary tract infections, and its leaves contain a compound called arbutin that may have antimicrobial effects in the urine. Evidence in people...

Read the full Uva Ursi monograph →
Sources

Sources & How We Checked

Uva Ursi 1,000 mg'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 8 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.

Uva Ursi 8 references
  1. Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
  2. Schulz V, Hansel R, Tyler VE. Rational Phytotherapy: A Physician's Guide to Herbal Medicine. Terry C. Telger, transl. 3rd ed. Berlin, GER: Springer, 1998.
  3. Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
  4. Wang L, Del Priore LV. Bull's-eye maculopathy secondary to herbal toxicity from uva ursi. Am J Ophthalmol 2004;137:1135-7. PubMed
  5. Beaux, D., Fleurentin, J., and Mortier, F. Effect of extracts of Orthosiphon stamineus Benth, Hieracium pilosella L., Sambucus nigra L. and Arctostaphylos uva-ursi (L.) Spreng. in rats. Phytother.Res 1999;13(3):222-225.
  6. de Arriba SG, Naser B, Nolte KU. Risk assessment of free hydroquinone derived from Arctostaphylos Uva-ursi folium herbal preparations. Int J Toxicol. 2013;32(6):442-453.
  7. Park JB, Kim D, Min JS, et al. Identification and characterization of in vitro inhibitors against UDP-glucuronosyltransferase 1A1 in uva-ursi extracts and evaluation of in vivo uva-ursi-drug interactions. Food Chem Toxicol. 2018;120:651-661. PubMed
  8. Chauhan B, Yu C, Krantis A, et al. In vitro activity of uva-ursi against cytochrome P450 isoenzymes and P-glycoprotein. Can J Physiol Pharmacol. 2007;85(11):1099-107.

See these in context on the Uva Ursi 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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