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Dietary supplement

Restharrow Ingredients & Drug Interactions

by TerraVita

Restharrow label
See full label image
Liquid 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 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 is a dietary supplement by TerraVita 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 Glycerite Liquid 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 Restharrow by TerraVita

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

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of Restharrow by TerraVita

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 Glycerite Liquid Extract, made from spiny restharrow. It's prepared as a liquid extract using glycerin as the carrier.

Traditionally, restharrow has been used for urinary and digestive concerns, though modern evidence for its effectiveness is not yet well established.

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 urinary tract and kidney health.
  • We looked for evidence on: Kidney stones (nephrolithiasis), Urinary tract infections (UTIs), 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).

We don't yet have reliable evidence that restharrow works for benign prostatic hyperplasia (enlarged prostate), kidney stones, urinary tract infections, or gastritis (stomach inflammation). These are the uses it's been traditionally applied to, but human studies are limited or absent.

If you're considering it for one of these purposes, talk with your pharmacist about what evidence exists and what other options might be better supported.

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 traditionally used in herbal medicine, but human safety data are limited, so caution is warranted. The product should be avoided during pregnancy — there isn't enough safety information to recommend it.

Safety while breastfeeding is also unknown, so it's best to avoid use then as well. No adverse effects have been reported in the data we hold, though this doesn't mean none can occur.

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, check with your pharmacist or doctor before starting this product — it may raise lithium levels (Moderate interaction). No other medication interactions are documented for the ingredients we could check.

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 single-ingredient herbal extract with a traditional history but limited modern evidence. If you take lithium, this product is not for you without medical oversight.

For anyone else, talk with your pharmacist about whether the traditional uses match your needs and whether the evidence supports it.

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 Restharrow, straight from the product label.

Brand TerraVita
Barcode (UPC) 064435229429
Net contents 1 Fluid Ounce(s); 30 mL
Market status On market
Date entered into DSLD Dec 13, 2022
DSLD ID 279459
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other
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 by TerraVita, 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:
25 Drop(s)
Maximum serving Sizes:
40 Drop(s)
Servings per container
227
UPC/BARCODE
064435229429
IngredientAmount% DV
Restharrow Glycerite Liquid Extract0.13 mL--

Other ingredients: Glycerin

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.
Brand IP Statement(s)

Copyright 2018 TerraVita - Distributed by ZooScape LLC, All Rights Reserved.

Formula

Glycerite liquid extract (1:5)

Formulation

Alcohol free No flavor

Suggested/Recommended/Usage/Directions

Suggested Use: Take 25-40 drops of extract in a small amount of warm water 3-4 times daily. Shake well before using.

Precautions

Keep away from children.

Do not use if safety seal around cap is broken or missing.

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

See for yourself

Restharrow by TerraVita label

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

Restharrow 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 by TerraVita

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

Serving size25 Drop(s) Dosage formLiquid Servings per container227 Amounts shown are per serving.

Restharrow Glycerite Liquid Extract

Interacts with
1 drug
0.13 mL 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 Glycerite Liquid Extract monograph & interactions

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

Interaction report

Restharrow by TerraVita Drug Interactions

Want to check YOUR meds against Restharrow?

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 Glycerite Liquid Extract 1

Individual Drug Interactions

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

1 of the 1 ingredient in Restharrow interact with drugs. Each result below shows which ingredient is responsible. Restharrow Glycerite Liquid Extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Restharrow 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 Glycerite Liquid Extract1 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 Glycerite Liquid Extract full monograph & interactions
The maker

Brand information

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

TerraVita

See all TerraVita products
Name
ZooScape LLC
Phone Number
844-449-0444
Web Address
www.ZooScape.com
Pharmacist Counseling Corner

Restharrow by TerraVita: Common Questions

Does Restharrow by TerraVita interact with any medications?
Yes. Based on its ingredients, Restharrow 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 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 is restharrow used for?
Traditionally, restharrow has been used for urinary and digestive issues — benign prostatic hyperplasia, kidney stones, urinary tract infections, and gastritis. However, we don't yet have reliable evidence that it works for any of these.
Can I take this if I'm pregnant or breastfeeding?
No. There isn't enough safety information during pregnancy, so it should be avoided. Safety while breastfeeding is also unknown, so avoid it then too. Talk with your doctor or pharmacist about what's safe for you.
What's in this product besides the active ingredient?
The extract is made with glycerin as a carrier. That's it — no other filler ingredients are listed.
Are there any side effects?
No adverse effects have been reported in the data we hold, though human safety data are limited overall. If you notice anything unusual after starting it, let your pharmacist know.
I take lithium. Can I use this product?
No, not without talking to your doctor or pharmacist first. Restharrow may increase lithium levels in your blood, which could make the medication stronger and cause problems. It's a Moderate interaction.

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 label
Go deeper

The Full Monographs Behind Restharrow’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'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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