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Dietary supplement

Culver's Root (Blackroot) Ingredients & Drug Interactions

by Pure Herbs

Liquid Category: Botanical
Most serious interaction: Moderate
The interaction bottom line Most serious interaction: Moderate

Culver's Root (Blackroot) is a dietary supplement by Pure Herbs with 1 active ingredient. Its ingredients are commonly taken for constipation, liver and gallbladder complaints, digestive upset.Based on those ingredients, 78 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Culver's Root Root Extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

HelloPharmacist Scorecard of Culver's Root (Blackroot) by Pure Herbs

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

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 liquid contains one active ingredient: Culver's Root Root Extract, also known as black root. There are no inactive ingredients listed.

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

We hold no graded evidence for this product's ingredients for its stated purpose.

Why this rating?
  • The label markets this product for: digestion and liver health with glucose and blood pressure support.
  • We looked for evidence on: Digestive health, Liver function, Glucose metabolism, Blood pressure regulation.
  • Our graded evidence for these ingredients doesn't cover that particular purpose.

No effectiveness ratings are on file for Culver's Root in the data we hold, so we can't tell you how well it works for any particular purpose.

The evidence, ingredient by ingredient Black Root

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.

Modern safety data for black root are limited, and the fresh root can cause significant digestive upset. The supplement can trigger abdominal pain or cramps, changes in stool color or odor, drowsiness, headache, nausea, and vomiting.

Large amounts have been linked to liver toxicity (hepatotoxicity). Culver's Root is rated possibly unsafe in pregnancy because of its strong laxative effect and lack of safety data — the facts advise against it during pregnancy.

It's also rated unsafe while breastfeeding due to insufficient safety information, so talk with your doctor or pharmacist before using it if you're nursing.

Side effects, ingredient by ingredient Black Root

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 — Black Root.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; heart-rhythm medications.
  • For scale: 78 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, double-check it with your pharmacist or doctor if you take warfarin (Coumadin) or any blood thinner, a heart medication like digoxin (Lanoxin), or any diuretic (water pill). These are the main medication types with documented interactions with black root.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no assessable stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

Culver's Root is a strong laxative supplement with notable interactions, especially with blood thinners, heart drugs, and diuretics. If you take any prescription medications — particularly warfarin, digoxin, or water pills — check with your pharmacist before starting this product.

Pregnant or breastfeeding? This one isn't recommended.

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 Dec 13, 2022.

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 Culver's Root (Blackroot), straight from the product label.

Brand Pure Herbs
Net contents 1 Fluid Ounce(s); 30 mL
Market status On market
Date entered into DSLD Dec 13, 2022
DSLD ID 278886
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Women (not pregnant or lactating)
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 Culver's Root (Blackroot) by Pure Herbs, 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 mL
Maximum serving Sizes:
2 mL
Servings per container
15
IngredientAmount% DV
Culver's Root Root Extract1892 mg--

Other ingredients: None

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

Directions: For adults, mix 2 mL (abt. 1/2 tsp) of extract in 2 fl. oz (60 mL) water one time daily preferably with a meal.

Shake well before use

Formulation

Beneficial for digestion and liver health. Contributes to a healthy glucose metabolism and helps to maintain a healthy blood pressure already within the normal range.

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.

Precautions

Warning: Not intended for use by pregnant or nursing women. If you have a medical condition or are taking medication, consult your doctor prior to use.

Discontinue use and consult with your doctor if any adverse reactions occur.

Keep out of reach of children

Brand IP Statement(s)

Pure Herbs, Ltd. Natural Herbal Extracts

FDA Statement of Identity

Dietary Supplement

General Statements

"No expense has been spared to provide the finest nature has to offer."

See for yourself

Culver's Root (Blackroot) by Pure Herbs label

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

What’s inside

The Ingredients in Culver's Root (Blackroot) by Pure Herbs

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

Serving size2 mL Dosage formLiquid Servings per container15 Amounts shown are per serving.

Culver's Root Root Extract

Interacts with
78 drugs
1892 mg per serving

Black Root is a traditional North American herb that was historically used as a strong laxative and to support digestion and liver function. There is...

Culver's Root Root Extract monograph & interactions

Other (inactive) ingredients: None. These complete the product’s ingredient list but are not active constituents.

Interaction report

Culver's Root (Blackroot) by Pure Herbs Drug Interactions

Want to check YOUR meds against Culver's Root (Blackroot)?

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
78Drugs
78 Moderate

Ingredients driving the most interactions

Each ingredient & the kinds of drugs it affects

For each ingredient in Culver's Root (Blackroot) 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.

Culver's Root Root Extract3 drug types · 78 drugs

Digoxin (Lanoxin)

Theoretically, the overuse or abuse of black root can increase the risk of adverse effects of cardiac glycoside drugs. Black root chemically binds with the glycosides while in the gastrointestinal (GI) tract, which may reduce their effectiveness if used concomitantly.

Likelihood Probable Evidence D
Diuretic Drugs

Overuse of black root might compound diuretic-induced potassium loss.There is some concern that people taking black root along with potassium depleting diuretics might have an increased risk for hypokalemia. Initiation of potassium supplementation or an increase in potassium supplement dose may be necessary for some patients. Some diuretics that can deplete potassium include chlorothiazide (Diuril), chlorthalidone (Thalitone), furosemide (Lasix), hydrochlorothiazide (HCTZ, Hydrodiuril, Microzide), and others.

Likelihood Possible Evidence D
Warfarin (Coumadin)

Black root has stimulant laxative effects. In some people black root can cause diarrhea. Diarrhea can increase the effects of warfarin, increase international normalized ratio (INR), and increase the risk of bleeding. Advise patients who take warfarin not to take excessive amounts of black root.

Likelihood Possible Evidence D
The maker

Brand information

Manufacturer and brand details for Culver's Root (Blackroot), from the product label.

Pure Herbs

See all Pure Herbs products
Name
Pure Herbs, Ltd.
City
Sterling Heights
State
MI
Phone Number
(800) 860-4372
Web Address
www.pureherbs.com
Pharmacist Counseling Corner

Culver's Root (Blackroot) by Pure Herbs: Common Questions

Does Culver's Root (Blackroot) by Pure Herbs interact with any medications?
Yes. Based on its ingredients, Culver's Root (Blackroot) has a known interaction with 78 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Culver's Root (Blackroot) 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.
What does black root do?
Black root is a strong laxative — it stimulates bowel movements. That's its main action, and it's what drives most of its side effects and drug interactions.
Can I take this if I'm pregnant?
No — the safety data advise against it during pregnancy because of its strong laxative effect and the lack of safety information. Talk with your doctor about alternatives.
Is it safe to breastfeed while taking Culver's Root?
The safety data show insufficient information to say it's safe while breastfeeding, so it's rated unsafe. Check with your doctor or pharmacist about whether it's right for you.
What side effects can black root cause?
It can cause abdominal pain or cramps, changes in stool color or odor, drowsiness, headache, nausea, and vomiting. Large amounts have been linked to liver toxicity, so don't overuse it.
Why is this risky with warfarin?
Black root causes diarrhea, which makes warfarin stronger and thins your blood more than intended. That raises your bleeding risk, so your doctor and pharmacist need to know if you're using both.

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.

Culver's Root (Blackroot) label
Go deeper

The Full Monographs Behind Culver's Root (Blackroot)’s Ingredients

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

Sources

Sources & How We Checked

Culver's Root (Blackroot)'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 2 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.

Black Root 2 references
  1. Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
  2. Fetrow CW, Avila JR. Professional's Handbook of Complementary & Alternative Medicines. 1st ed. Springhouse, PA: Springhouse Corp., 1999.

See these in context on the Black 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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