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Dietary supplement

Gravel Root Ingredients & Drug Interactions

by Maine Coast Herbals

Gravel Root label
See full label image
Capsule Category: Botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Gravel Root 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

Gravel Root is a dietary supplement by Maine Coast Herbals with 1 active ingredient. Its ingredients are commonly taken for kidney stones, urinary tract complaints, fluid retention.Based on those ingredients, 88 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Gravel Root. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Gravel Root by Maine Coast Herbals

Ask about any prescription or over-the-counter medication and we check it for interactions with Gravel Root by Maine Coast Herbals — and tell you which ingredient is responsible.

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Computed from our clinical databases

HelloPharmacist Scorecard of Gravel Root by Maine Coast Herbals

Four independent checks of what is known — a summary of the available information, not a grade of the product itself.

Evidence for Intended Use
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

The stated purpose hasn't been mapped to our evidence data yet.

Why this rating?
  • We haven't mapped this product's purpose to our evidence data yet — it'll be graded on the next content refresh.
Ingredient Transparency
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.
Known Interaction Concern
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 — Gravel Root.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: lithium.
  • For scale: 89 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.
Safety Information
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.

HelloPharmacist summaryFully disclosed formula with no assessable stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Jun 25, 2013.

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 Gravel Root, straight from the product label.

Brand Maine Coast Herbals
Barcode (UPC) 818572010170
Net contents 100 Capsule(s)
Market status Off market
Date entered into DSLD Jun 25, 2013
DSLD ID 22267
Product type Botanical
Supplement form Capsule
Dietary claims / uses All Other
Intended target group(s) Adult (18 - 50 Years), Gluten Free, Dairy Free, Sugar 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 Gravel Root by Maine Coast Herbals, 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:
2 Capsule(s)
Maximum serving Sizes:
2 Capsule(s)
UPC/BARCODE
818572010170
IngredientAmount% DV
Gravel Root550 mg--

Other ingredients: Gravel Root, Gelatin

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.
General Statements

MADE IN USA

Botanical Formula Capsules

WC : Wildcrafted CO : Certified Organic

FDA Statement of Identity

Dietary Supplement

Formulation

No Sugar, No Artificial Colors, No Artificial Flavors, Sodium Free, No Wheat, No Gluten, No Soy, No Dairy, Yeast Free.

Precautions

WARNING: Do not take this product if you are pregnant, could become pregnant, or are nursing. Consult your healthcare provider before use, especially if you are taking any prescription medications are are receiving medical treatment.

Discontinue use if unusual symptoms occur.

KEEP OUT OF REACH OF CHILDREN

Suggested/Recommended/Usage/Directions

DIRECTIONS: As a dietary supplement, take two capsules, up to three times a day, with a full glass of water.

Storage

Store in a cool, dry place.

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

See for yourself

Gravel Root by Maine Coast Herbals label

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

Gravel Root 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 Gravel Root by Maine Coast Herbals

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

Serving size2 Capsule(s) Dosage formCapsule Amounts shown are per serving.

Gravel Root

Interacts with
88 drugs
550 mg per serving

Gravel Root is a traditional North American herb long used by herbalists for kidney stones and urinary problems, but there is very little modern scien...

Gravel Root monograph & interactions

Other (inactive) ingredients: Gravel Root, Gelatin. These complete the product’s ingredient list but are not active constituents.

Interaction report

Gravel Root by Maine Coast Herbals Drug Interactions

Gravel Root contains a single active ingredient, and it has known interactions with 88 medications. Here’s the picture, then you can look up your own drug.

Want to check YOUR meds against Gravel Root?

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
88Drugs
88 Moderate

Ingredients driving the most interactions

Gravel Root 88

Individual Drug Interactions

The ingredients in Gravel Root interact with 88 drugs. Click any drug to see the details.

1 of the 1 ingredient in Gravel Root interact with drugs. Each result below shows which ingredient is responsible. Gravel Root

Each ingredient & the kinds of drugs it affects

For each ingredient in Gravel Root 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.

Gravel Root2 drug types · 88 drugs

Cytochrome P450 3A4 (Cyp3A4) Inducers

Hepatotoxic pyrrolizidine alkaloids (PA) are substrates of cytochrome P450 3A4 (CYP3A4). Theoretically, drugs that induce CYP3A4 might increase the conversion of PAs to toxic metabolites. Some drugs that induce CYP3A4 include carbamazepine (Tegretol), phenobarbital, phenytoin (Dilantin), rifampin, rifabutin (Mycobutin), and others.

Likelihood Possible Evidence D
Lithium

Gravel root is thought to have diuretic properties. Theoretically, due to these potential diuretic effects, gravel root might reduce excretion and increase levels of lithium. The dose of lithium might need to be decreased.

Likelihood Probable Evidence D
Gravel Root full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Gravel Root, from the product label.

Maine Coast Herbals

See all Maine Coast Herbals products
Name
Maine Coast Herbals
Street Address
749 Avenue Rd
City
Corinth
State
ME
ZipCode
04427
Web Address
www.maineherbs.com
Pharmacist Counseling Corner

Gravel Root by Maine Coast Herbals: Common Questions

Does Gravel Root by Maine Coast Herbals interact with any medications?
Yes. Based on its ingredients, Gravel Root has a known interaction with 88 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Gravel Root 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.

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

Not sure if Gravel Root is safe with your meds?

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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.

Gravel Root label
Go deeper

The Full Monographs Behind Gravel Root’s Ingredients

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

Herb & supplement monograph

Gravel Root

Interacts with 88 drugs

Gravel Root is a traditional North American herb long used by herbalists for kidney stones and urinary problems, but there is very little modern scientific evidence to support these uses. Be...

Read the full Gravel Root monograph →
Sources

Sources & How We Checked

Gravel Root'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 5 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.

Gravel Root 5 references
  1. WHO working group. Pyrrolizidine alkaloids. Environmental Health Criteria, 80. WHO: Geneva, 1988.
  2. Stickel F, Seitz HK. The efficacy and safety of comfrey. Public Health Nutr 2000;3:501-8. PubMed
  3. Chojkier M. Hepatic sinusoidal-obstruction syndrome: toxicity of pyrrolizidine alkaloids. J Hepatol 2003;39:437-46. PubMed
  4. Roeder E. Medicinal plants in Europe containing pyrrolizidine alkaloids. Pharmazie 1995;50:83-98.
  5. Wang YP, Yan J, Fu PP, Chou MW. Human liver microsomal reduction of pyrrolizidine alkaloid N-oxides to form the corresponding carcinogenic parent alkaloid. Toxicol Lett 2005;155:411-20. PubMed

See these in context on the Gravel Root 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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