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Dietary supplement

Restharrow Powder Ingredients & Drug Interactions

by TerraVita Premium Collection

Restharrow Powder label
See full label image
Powder Category: Botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 9, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Restharrow Powder 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

Restharrow Powder is a dietary supplement by TerraVita Premium Collection with 1 active ingredient. Its ingredients are commonly taken for increasing urine flow (mild diuretic), flushing the urinary tract, mild bladder and kidney complaints.Based on those ingredients, 1 medication has a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Restharrow, Powder. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Restharrow Powder by TerraVita Premium Collection

Ask about any prescription or over-the-counter medication and we check it for interactions with Restharrow Powder by TerraVita Premium Collection — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Restharrow Powder by TerraVita Premium Collection

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 Jul 11, 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: restharrow powder, also known as spiny restharrow. It's a traditional herbal remedy that's been used for various urinary and digestive purposes.

There are no inactive fillers or other ingredients in this formulation.

Does it work?

Insufficient evidence
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
Insufficient

There isn't enough reliable clinical evidence to rate this product's ingredients for its stated purpose.

Why this rating?
  • The label markets this product for: Support for urinary tract and kidney health.
  • We looked for evidence on: Kidney stones (nephrolithiasis), Urinary tract infections (UTIs), Urinary flow, Fluid retention, Bladder support.
  • The closest evidence on file: Spiny Restharrow is rated "Insufficient Reliable Evidence To Rate" for Kidney stones (nephrolithiasis) (Natural Medicines).
  • Also on file: Spiny Restharrow is rated "Insufficient Reliable Evidence To Rate" for Urinary tract infections (UTIs).

The evidence for restharrow's effectiveness isn't established in our data. We hold insufficient reliable evidence to rate it for benign prostatic hyperplasia, kidney stones, urinary tract infections, or gastritis.

That doesn't mean it doesn't work — it means human studies haven't yet provided the proof we'd need to say so confidently.

The evidence, ingredient by ingredient Spiny Restharrow

How safe is it?

Some data gaps
Safety Information · database check
Some gaps

Safety data exists for these ingredients, but with some important gaps.

Why this rating?
  • We hold adverse-effect (side-effect) data for 0 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.

Restharrow is generally regarded as traditionally used, but human safety data are limited. The safety data advises against use during pregnancy and while breastfeeding because there isn't enough information to know either way.

If you're pregnant, nursing, or planning to become pregnant, talk with your doctor or pharmacist before taking this product.

Side effects, ingredient by ingredient Spiny Restharrow

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 — Spiny Restharrow.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: lithium.
  • For scale: 1 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 lithium for a mood disorder, do not start this product without talking to your pharmacist or doctor — restharrow may increase lithium levels in your blood.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with insufficient evidence for its stated purpose. Moderate medication interactions have been identified, and some safety-information gaps remain.

Restharrow is a traditional herb with limited modern safety and effectiveness data. If you take lithium, you'll need to check with your pharmacist first.

If you're pregnant or breastfeeding, avoid this product unless your doctor says otherwise.

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 Apr 21, 2023.

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 Restharrow Powder, straight from the product label.

Brand TerraVita Premium Collection
Barcode (UPC) 064435136826
Net contents 4 Ounce(s)
Market status On market
Date entered into DSLD Apr 21, 2023
DSLD ID 290511
Product type Botanical
Supplement form Powder
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years)
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 Restharrow Powder by TerraVita Premium Collection, 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:
0.25 Teaspoon(s)
Maximum serving Sizes:
0.25 Teaspoon(s)
Servings per container
113
UPC/BARCODE
064435136826
IngredientAmount% DV
Restharrow, Powder1000 mg--

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 Statement of Identity

A Dietary Supplement

Brand IP Statement(s)

Copyright 2005 TerraVita - Distributed by ZooScape LLC, All Rights Reserved.

Suggested/Recommended/Usage/Directions

Directions Stir 1/4 of a teaspoon into a glass of water and consume 3 times daily, with meals.

General Statements

TerraVita is an exclusive line of premium natural products that use the finest, purest and most potent ingredients in the world. TerraVita's hallmarks are the highest possible standards of purity, potency, stability and freshness. All products are prepared with the greatest quality control, from raw materials through the entire manufacturing process, right up to the moment your product is sealed for freshness and shipped to you.

Please recycle!

FDA Disclaimer Statement

Statements not evaluated by FDA. Product not intended to diagnose, treat, cure, or prevent any disease.

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

See for yourself

Restharrow Powder by TerraVita Premium Collection label

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

Restharrow Powder 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 Restharrow Powder by TerraVita Premium Collection

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

Serving size0.25 Teaspoon(s) Dosage formPowder Servings per container113 Amounts shown are per serving.

Restharrow, Powder

Interacts with
1 drug
1000 mg per serving

Spiny Restharrow is a traditional European herb whose root has long been used as a mild diuretic to help flush the urinary tract. Solid human evidence...

Restharrow, Powder monograph & interactions
Interaction report

Restharrow Powder by TerraVita Premium Collection Drug Interactions

Want to check YOUR meds against Restharrow Powder?

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
1Drugs
1 Moderate

Ingredients driving the most interactions

Restharrow, Powder 1

Individual Drug Interactions

The ingredients in Restharrow Powder interact with 1 drug. Click any drug to see the details.

1 of the 1 ingredient in Restharrow Powder interact with drugs. Each result below shows which ingredient is responsible. Restharrow, Powder

Each ingredient & the kinds of drugs it affects

For each ingredient in Restharrow Powder 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.

Restharrow, Powder1 drug type · 1 drug

Lithium

Theoretically, spiny restharrow might increase the levels and clinical effects of lithium.
Spiny restharrow is thought to have diuretic properties. Although animal studies suggest that spiny restharrow reduces edema, diuretic activity has not been reported or evaluated in humans. Theoretically, due to these potential diuretic effects, spiny restharrow might reduce excretion and increase levels of lithium. The dose of lithium might need to be decreased.

Likelihood Possible Evidence D
Restharrow, Powder full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Restharrow Powder, from the product label.

TerraVita Premium Collection

See all TerraVita Premium Collection products
Name
TerraVita Fine Whole Herbs
City
Brampton
State
Ontario
Pharmacist Counseling Corner

Restharrow Powder by TerraVita Premium Collection: Common Questions

Does Restharrow Powder by TerraVita Premium Collection interact with any medications?
Yes. Based on its ingredients, Restharrow Powder has a known interaction with 1 medication. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Restharrow Powder 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.
Is restharrow safe during pregnancy?
No — the safety data advises against use during pregnancy. If you're pregnant or planning to become pregnant, talk with your doctor or pharmacist before taking this product.
Can I use restharrow while breastfeeding?
The safety data advises against it because there isn't enough information about restharrow and breastfeeding. If you're nursing, discuss this product with your pharmacist or doctor first.
Does restharrow actually work for kidney stones or UTIs?
The evidence isn't established yet. We hold insufficient reliable evidence to rate it for those uses — that means human studies haven't shown clear proof one way or the other.
What are the known side effects?
Our data don't list specific side effects, though human safety information for restharrow is limited overall. If you notice anything unusual after starting it, let your pharmacist know.
Why is restharrow used in traditional medicine?
It's been traditionally used for urinary tract issues, kidney stones, benign prostatic hyperplasia, and gastritis — though modern evidence for these uses hasn't been fully established yet.

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.

Restharrow Powder label
Go deeper

The Full Monographs Behind Restharrow Powder’s Ingredients

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

Herb & supplement monograph

Spiny Restharrow

Interacts with 1 drug

Spiny Restharrow is a traditional European herb whose root has long been used as a mild diuretic to help flush the urinary tract. Solid human evidence for its benefits is very limited, so an...

Read the full Spiny Restharrow monograph →
Sources

Sources & How We Checked

Restharrow Powder'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.

Spiny Restharrow 2 references
  1. Blumenthal M, ed. The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. Trans. S. Klein. Boston, MA: American Botanical Council, 1998.
  2. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.

See these in context on the Spiny Restharrow 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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