Interactions on record — worth a quick check against your medications. Based on 1 of 2 ingredients. Check your meds →
Dietary supplement

Uva Ursi Max-V Ingredients & Drug Interactions

by Douglas Laboratories

Uva Ursi Max-V label
See full label image
Capsule Category: Botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 23, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Uva Ursi Max-V 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 Max-V is a dietary supplement by Douglas Laboratories with 2 active ingredients. 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 herbal 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 Max-V by Douglas Laboratories

Ask about any prescription or over-the-counter medication and we check it for interactions with Uva Ursi Max-V by Douglas Laboratories — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Uva Ursi Max-V by Douglas Laboratories

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 2 of its 2 active ingredients.
  • “Uva Ursi herbal extract” is listed as a grouped ingredient — the label gives one combined amount (200 mg) without saying how much of each component you get.

Uva Ursi Max-V contains 2 active ingredients: arbutin and uva ursi herbal extract. Uva ursi is a dried leaf used traditionally to support urinary tract health.

The product also includes inactive ingredients — hydroxypropyl methylcellulose, vegetable stearate, and microcrystalline cellulose — which are the capsule material and binders that hold everything together.

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 (UTIs), the data rates it as possibly ineffective — meaning the evidence doesn't support that it works for this use.

For other conditions like bronchitis and benign prostatic hyperplasia (an enlarged prostate), there isn't enough reliable evidence to rate how well it works. The data we hold doesn't establish strong effectiveness for the uses this product is marketed toward.

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 when used at low doses for a short time. The most common side effects are diarrhea, nausea, stomach upset, and vomiting.

Because it can be toxic at high doses or with long-term use, this should be a short-term supplement only — not something to take indefinitely. At very high doses (20 grams or more of the dried herb), serious effects including convulsions, delirium, shortness of breath, and tinnitus have been reported, and doses of 30 grams or higher may be fatal.

Uva ursi is not safe in pregnancy — it may stimulate the uterus and lacks adequate safety data. There isn't enough information to use it while breastfeeding either.

Talk with your doctor or pharmacist if you're pregnant, planning to become pregnant, or breastfeeding before considering this product.

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 you take this product, double-check with your doctor or pharmacist if you're on lithium (Moderate severity) — uva ursi may raise its levels. Also check if you take any CYP2C19 substrates, CYP3A4 substrates, or glucuronidated drugs (all Moderate severity), as uva ursi may slow how your body clears them.

If you're on urinary acidifying agents, let your pharmacist know, since they may reduce this product's effects. Use the medication search tool on this page to confirm your specific drugs.

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 Max-V may be worth considering if you're looking at short-term urinary tract support, though the evidence it actually works for UTIs is weak. If you take lithium, any CYP2C19 or CYP3A4 substrates, glucuronidated drugs, or urinary acidifying agents, you need to check with your doctor or pharmacist before starting — this product may affect how those medications work.

It's not appropriate if you're pregnant or breastfeeding. Because it can be toxic with prolonged or high-dose use, keep this short-term and talk it over with your doctor or pharmacist before you begin.

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

Assessment coverage: 1 of 2 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Aug 23, 2020.

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 Max-V, straight from the product label.

Brand Douglas Laboratories
Barcode (UPC) 310539003121
Net contents 60 Vegetarian Capsule(s)
Market status On market
Date entered into DSLD Aug 23, 2020
DSLD ID 232466
Product type Botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), 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 Max-V by Douglas Laboratories, 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 Vegetarian Capsule(s)
Maximum serving Sizes:
1 Vegetarian Capsule(s)
Servings per container
60
UPC/BARCODE
310539003121
IngredientAmount% DV
Arbutin40 mg--
Uva Ursi herbal extract200 mg--
Uva Ursi100 mg--

Other ingredients: Hydroxypropyl Methylcellulose, Vegetable Stearate, Microcrystalline Cellulose

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 Usage: As a dietary supplement, adults take 1 capsule daily between meals, or as directed by your health professional. If digestive irritation occurs, take with meals.

Precautions

Warning: If you are pregnant, nursing, have any health condition or taking any medication, consult your health professional before using this product. For occasional use only. Consult a heath professional for use for more than 1 week.

Keep out of the reach of children.

Use only if safety seal is intact.

Storage

Store in a cool, dry place.

Formulation

Gluten-free, Non-GMO

Traditional support for urinary tract health

FDA Disclaimer Statement

This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

General Statements

Contents may not fill package in order to accommodate required labeling. Please rely on stated quantity. Scan to learn about our manufacturing excellence

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

Uva Ursi Max-V by Douglas Laboratories label

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

Uva Ursi Max-V 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 Max-V by Douglas Laboratories

These are the 2 active ingredients this product is made of. Select any to open its full monograph.

Serving size1 Vegetarian Capsule(s) Dosage formCapsule Servings per container60 Amounts shown are per serving.

Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.

Uva Ursi herbal extract

Interacts with
803 drugs
200 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 herbal extract monograph & interactions
  • › Arbutin

Uva Ursi

Interacts with
803 drugs
100 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 monograph & interactions

Other (inactive) ingredients: Hydroxypropyl Methylcellulose, Vegetable Stearate, Microcrystalline Cellulose. These complete the product’s ingredient list but are not active constituents.

Interaction report

Uva Ursi Max-V by Douglas Laboratories Drug Interactions

Want to check YOUR meds against Uva Ursi Max-V?

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 herbal extract 803

Individual Drug Interactions

The ingredients in Uva Ursi Max-V interact with 803 drugs. Click any drug to see the details.

1 of the 2 ingredients in Uva Ursi Max-V interact with drugs. Each result below shows which ingredient is responsible. Uva Ursi herbal extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Uva Ursi Max-V 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 herbal 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 herbal extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Uva Ursi Max-V, from the product label.

Douglas Laboratories

See all Douglas Laboratories products
Name
Douglas Laboratories
Street Address
600 Boyce Road
City
Pittsburgh
State
PA
ZipCode
15205
Phone Number
1.800.245.4440
Web Address
www.douglaslabs.com
Pharmacist Counseling Corner

Uva Ursi Max-V by Douglas Laboratories: Common Questions

Does Uva Ursi Max-V by Douglas Laboratories interact with any medications?
Yes. Based on its ingredients, Uva Ursi Max-V 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 Max-V contains 2 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is 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 if I'm trying to get pregnant or breastfeeding?
No — uva ursi is not safe in pregnancy because it may stimulate the uterus and doesn't have adequate safety data. There also isn't enough information to know if it's safe while breastfeeding. Talk with your doctor before considering this product if you're pregnant, planning to become pregnant, or nursing.
How long can I take Uva Ursi Max-V?
This product should be used short-term only. Uva ursi can be toxic with prolonged use or high doses, so it's not designed for long-term daily use. Follow the label directions and talk with your pharmacist about how long is appropriate for you.
What are the most common side effects?
At low doses used short-term, uva ursi is generally well tolerated. The most common side effects are diarrhea, nausea, stomach upset, and vomiting. At very high doses, much more serious effects can occur, but those are rare.
Does this actually work for urinary tract infections?
The evidence doesn't support that uva ursi is effective for UTIs — it's actually rated as possibly ineffective for that use. For other conditions like bronchitis and prostate health, there just isn't enough reliable evidence to say whether it works.
What is arbutin?
Arbutin is one of the two active ingredients in this product and is a compound found in uva ursi. We don't have interaction data on file for arbutin, so we can't check how it affects medications — ask your pharmacist if you have specific drug concerns.

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

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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 Max-V label
Go deeper

The Full Monographs Behind Uva Ursi Max-V’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 Max-V'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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