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Dietary supplement

Hound's Tongue Ingredients & Drug Interactions

by Flower Essence Services

Hound's Tongue label
See full label image
Liquid Category: Botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 30, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Hound's Tongue 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

Hound's Tongue is a dietary supplement by Flower Essence Services with 1 active ingredient. Its ingredients are commonly taken for minor wounds and skin irritation, coughs and sore throat, hemorrhoids.Based on those ingredients, 87 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are infusion of Hound's Tongue. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Hound's Tongue by Flower Essence Services

Ask about any prescription or over-the-counter medication and we check it for interactions with Hound's Tongue by Flower Essence Services — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of Hound's Tongue by Flower Essence Services

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

Low disclosure
Ingredient Transparency · database check
Low

Most active ingredients don't disclose an individual amount — you can't tell how much of each you're getting.

Why this rating?
  • The label discloses an exact amount for 0 of its 1 active ingredient.

Hound's Tongue by Flower Essence Services is a liquid extract containing one active ingredient: an infusion of Hound's Tongue. The product also contains brandy, water, and 40% alcohol as inactive ingredients.

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

This is a single-ingredient Hound's Tongue product and its label doesn't state a use — see Hound's Tongue's own graded uses on its monograph.

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.

We have no effectiveness data on file for this product.

The evidence, ingredient by ingredient Hound's Tongue

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.

This product carries serious safety concerns. Hound's Tongue contains pyrrolizidine alkaloids—compounds toxic to the liver.

Chronic use of plants with these alkaloids is linked to veno-occlusive disease (VOD), a condition that blocks blood flow in the liver. Acute VOD can cause epigastric pain, vomiting, diarrhea, and ascites (fluid buildup in the abdomen) within days; liver enlargement and hardening can develop within weeks.

Because of these toxic alkaloids, internal use is not recommended. The product is rated Likely Unsafe in pregnancy because the alkaloids may harm the liver and fetus.

It is also rated Likely Unsafe while breastfeeding, as toxic compounds may pass into breast milk.

Side effects, ingredient by ingredient Hound's Tongue

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 — Hound's Tongue.
  • The most serious interaction on file is rated Moderate.
  • For scale: 88 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 do take this product, you should check it against any CYP3A4-inducing medications (drugs that speed up liver metabolism). This is a Moderate-severity interaction concern.

However, the product's own hepatotoxicity profile means the bigger risk comes from the product itself, not just drug interactions.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFormula with limited ingredient disclosure with no assessable stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

Internal use of this product is not recommended due to documented liver toxicity from its alkaloid content. If you are pregnant, breastfeeding, or have liver concerns, avoid it.

Anyone considering it should talk with their pharmacist or doctor first.

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 Jan 24, 2014.

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 Hound's Tongue, straight from the product label.

Brand Flower Essence Services
Barcode (UPC) 782932110261
Net contents 30 mL; 1 fl. Oz.
Market status On market
Date entered into DSLD Jan 24, 2014
DSLD ID 29784
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other
Intended target group(s) Adult (18 - 50 Years), Organic
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 Hound's Tongue by Flower Essence Services, 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 Drop(s)
Maximum serving Sizes:
2 Drop(s)
UPC/BARCODE
782932110261
IngredientAmount% DV
infusion of Hound's Tongue0 NP--

Other ingredients: brandy, Water, 40% Alcohol

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

0508 Professional quality backed by two decades of international use.

Cynoglossum grande flower essence

Write for supplement facts.

Suggested/Recommended/Usage/Directions

Add 2 drops to water, take 4 times daily.

Seals/Symbols

DEMETER

FES Quintessentials(TM)

Formulation

Biodynamic / organic

FDA Statement of Identity

herbal supplement

Formula

40% alcohol.

General

0508

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

See for yourself

Hound's Tongue by Flower Essence Services label

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

Hound's Tongue 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 Hound's Tongue by Flower Essence Services

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

Serving size2 Drop(s) Dosage formLiquid Amounts shown are per serving.

Infusion of Hound's Tongue

Interacts with
87 drugs
0 NP per serving

Hound's Tongue is a traditional folk remedy used mostly on the skin and for coughs, but there is little to no reliable human research showing it works...

Infusion of Hound's Tongue monograph & interactions

Other (inactive) ingredients: Brandy, Water, 40% Alcohol. These complete the product’s ingredient list but are not active constituents.

Interaction report

Hound's Tongue by Flower Essence Services Drug Interactions

Want to check YOUR meds against Hound's Tongue?

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
87Drugs
87 Moderate

Ingredients driving the most interactions

infusion of Hound's Tongue 87

Individual Drug Interactions

The ingredients in Hound's Tongue interact with 87 drugs. Click any drug to see the details.

1 of the 1 ingredient in Hound's Tongue interact with drugs. Each result below shows which ingredient is responsible. infusion of Hound's Tongue

Each ingredient & the kinds of drugs it affects

For each ingredient in Hound's Tongue 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.

infusion of Hound's Tongue1 drug type · 87 drugs

Cytochrome P450 3A4 (Cyp3A4) Inducers

Theoretically, CYP3A4 inducers can increase the toxicity of the pyrrolizidine alkaloid (PA) constituents of hound's tongue.
Hepatotoxic PAs are substrates of cytochrome P450 3A4 (CYP3A4). Drugs that induce CYP3A4 might increase the conversion of PAs to toxic metabolites.

Likelihood Possible Evidence D
infusion of Hound's Tongue full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Hound's Tongue, from the product label.

Flower Essence Services

See all Flower Essence Services products
Name
Flower Essence Services
Street Address
P.O. Box 1769
City
Nevada City
State
CA
ZipCode
95959
Pharmacist Counseling Corner

Hound's Tongue by Flower Essence Services: Common Questions

Does Hound's Tongue by Flower Essence Services interact with any medications?
Yes. Based on its ingredients, Hound's Tongue has a known interaction with 87 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Hound's Tongue 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.
Can I use Hound's Tongue if I'm pregnant?
No. The safety data rates it Likely Unsafe in pregnancy because the toxic alkaloids in the product may harm your liver and your baby's development. Talk with your doctor or pharmacist before considering it.
Is it safe to use while breastfeeding?
No. It's rated Likely Unsafe while breastfeeding because toxic compounds from the product may pass into your breast milk and reach your baby. Speak with your pharmacist or doctor if you have questions.
What are the side effects of pyrrolizidine alkaloids in this product?
The alkaloids in Hound's Tongue are toxic to the liver. Acute liver damage can cause epigastric pain, vomiting, diarrhea, and fluid buildup in the belly within days. Chronic exposure may lead to veno-occlusive disease, a serious condition that blocks blood flow in the liver.
Why doesn't this product have an effectiveness rating?
We have no effectiveness data on file for Hound's Tongue. The available evidence doesn't establish whether it works for any particular purpose.
Does the alcohol content matter?
The product contains 40% alcohol. If you avoid alcohol for any reason—pregnancy, breastfeeding, liver disease, medication interaction, or personal choice—this ingredient is relevant to your decision.
Should I avoid this if I'm on a CYP3A4-inducing medication?
Yes, this is a documented Moderate-severity interaction risk. But more importantly, the product's own hepatotoxic alkaloids mean internal use carries risks regardless of what medications you take. Talk with your pharmacist before using it.

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

Not sure if Hound's Tongue 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.

Hound's Tongue label
Go deeper

The Full Monographs Behind Hound's Tongue’s Ingredients

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

Herb & supplement monograph

Hound's Tongue

Interacts with 87 drugs

Hound's Tongue is a traditional folk remedy used mostly on the skin and for coughs, but there is little to no reliable human research showing it works. More importantly, it contains pyrroliz...

Read the full Hound's Tongue monograph →
Sources

Sources & How We Checked

Hound's Tongue'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 4 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.

Hound's Tongue 4 references
  1. WHO working group. Pyrrolizidine alkaloids. Environmental Health Criteria, 80. WHO: Geneva, 1988.
  2. Chojkier M. Hepatic sinusoidal-obstruction syndrome: toxicity of pyrrolizidine alkaloids. J Hepatol 2003;39:437-46. PubMed
  3. Roeder E. Medicinal plants in Europe containing pyrrolizidine alkaloids. Pharmazie 1995;50:83-98.
  4. 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 Hound's Tongue 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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