Interactions on record — worth a quick check against your medications. Check your meds →
Dietary supplement

Alcohol & Sugar-Free Mullein Leaf Liquid Extract Ingredients & Drug Interactions

by Swanson Premium Brand

Alcohol & Sugar-Free Mullein Leaf Liquid Extract label
See full label image
Liquid Category: Botanical
Most serious interaction: Minor
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Alcohol & Sugar-Free Mullein Leaf Liquid Extract 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: Minor

Alcohol & Sugar-Free Mullein Leaf Liquid Extract is a dietary supplement by Swanson Premium Brand with 1 active ingredient. Its ingredients are commonly taken for cough and chest congestion, sore throat, bronchitis and respiratory irritation.Based on those ingredients, 122 medications have a known interaction with it, the most serious rated minor. The ingredients most likely to interact are Mullein leaf extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

Jump to a section

Check Your Meds Against Alcohol & Sugar-Free Mullein Leaf Liquid Extract by Swanson Premium Brand

Ask about any prescription or over-the-counter medication and we check it for interactions with Alcohol & Sugar-Free Mullein Leaf Liquid Extract by Swanson Premium Brand — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
Prefer a human? Send your question to our licensed pharmacists — free, answered by email within 24 hours.

HelloPharmacist Scorecard of Alcohol & Sugar-Free Mullein Leaf Liquid Extract by Swanson Premium Brand

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 16, 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: mullein leaf extract, a concentrated form of the mullein plant. It comes in a liquid form with vegetable glycerin and purified water as inactive ingredients — no alcohol or added sugar.

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 Mullein product and its label doesn't state a use — see Mullein'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.

The evidence for mullein leaf in treating cough, bronchitis, asthma, migraine headache, and diarrhea is insufficient in the data we hold. That doesn't mean it doesn't work — it means reliable human studies establishing its benefit for these uses aren't available yet.

If you're considering this for a specific condition, talk with your doctor or pharmacist about what the current evidence does and doesn't support.

The evidence, ingredient by ingredient Mullein

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.

Mullein leaf extract is generally well tolerated for short-term use, though human safety data are limited. A small number of case reports have described contact dermatitis (skin irritation) after direct skin contact with the whole plant or from breathing in plant dust — usually in people who also reacted to other plants.

There isn't enough data to recommend this during pregnancy or while breastfeeding; talk with your doctor or pharmacist for personalized advice if you're pregnant, planning to become pregnant, or nursing.

Side effects, ingredient by ingredient Mullein

Meds to double-check

Minor interactions only
Known Interaction Concern · database check
Minor only

Only Minor-severity interactions are documented for these ingredients.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Mullein.
  • The most serious interaction on file is rated Minor.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs.
  • For scale: 122 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.

Blood thinners (anticoagulant and antiplatelet drugs) — including warfarin, aspirin, and similar medications — may have their effects slightly increased by mullein leaf extract. Check your exact medications with your doctor or pharmacist before starting this supplement.

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. Only minor medication interactions are documented, and safety information is well characterized.

Mullein leaf extract is generally well tolerated and may appeal to people interested in traditional respiratory support — but the evidence for its effectiveness isn't yet established. If you take blood thinners, check with your doctor or pharmacist first.

For pregnancy or breastfeeding, the safety data are too limited to recommend it without a healthcare provider's input.

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 Jun 25, 2018.

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 Alcohol & Sugar-Free Mullein Leaf Liquid Extract, straight from the product label.

Brand Swanson Premium Brand
Barcode (UPC) 087614113159
Net contents 1 fl. Oz.; 29.6 mL
Market status On market
Date entered into DSLD Jun 25, 2018
DSLD ID 178262
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other
Intended target group(s) Adult (18 - 50 Years), 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 Alcohol & Sugar-Free Mullein Leaf Liquid Extract by Swanson Premium Brand, 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:
1 mL
Maximum serving Sizes:
1 mL
Servings per container
29
UPC/BARCODE
087614113159
IngredientAmount% DV
Mullein leaf extract1 Gram(s)--

Other ingredients: Vegetable Glycerin, purified Water

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

Bringing wellness to the world since 1969

To reorder, call toll free 1-800-437-4148 or visit our website at www.swansonvitamins.com

Formulation

Alcohol & sugar-free

FDA Statement of Identity

Herbal Supplement

Seals/Symbols

Guaranteed purity & potency

Precautions

Do not use if seal is broken.

Keep out of reach of children.

Warning: Consult your healthcare provider before use if you are pregnant or nursing.

Storage

Store in a cool, dry place.

Suggested/Recommended/Usage/Directions

Suggested Use: As a dietary supplement, take one dropperful (approx. 28 drops) three times per day in a small amount of water. Shake well before use.

General

SW1315 Rev 0 12 05 17

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

See for yourself

Alcohol & Sugar-Free Mullein Leaf Liquid Extract by Swanson Premium Brand label

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

Alcohol & Sugar-Free Mullein Leaf Liquid Extract 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 Alcohol & Sugar-Free Mullein Leaf Liquid Extract by Swanson Premium Brand

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

Serving size1 mL Dosage formLiquid Servings per container29 Amounts shown are per serving.

Mullein leaf extract

Interacts with
122 drugs
1 Gram(s) per serving

Mullein is a traditional herbal remedy most often used as a tea or syrup to soothe coughs, sore throats, and respiratory irritation. High-quality huma...

Mullein leaf extract monograph & interactions

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

Interaction report

Alcohol & Sugar-Free Mullein Leaf Liquid Extract by Swanson Premium Brand Drug Interactions

Want to check YOUR meds against Alcohol & Sugar-Free Mullein Leaf Liquid Extract?

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
122Drugs
122 Minor

Ingredients driving the most interactions

Mullein leaf extract 122

Individual Drug Interactions

The ingredients in Alcohol & Sugar-Free Mullein Leaf Liquid Extract interact with 122 drugs. Click any drug to see the details.

1 of the 1 ingredient in Alcohol & Sugar-Free Mullein Leaf Liquid Extract interact with drugs. Each result below shows which ingredient is responsible. Mullein leaf extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Alcohol & Sugar-Free Mullein Leaf Liquid Extract 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.

Mullein leaf extract1 drug type · 122 drugs

Anticoagulant/Antiplatelet Drugs

Lab tests on extracts from different parts of common and dense-flowered mullein plants show that they do have some blood-thinning effects, as they increase the time it takes for blood to clot. This is likely due to at least one of the known constituents of muellein, triterpenoid saponins. However, the effects appear to be mild and results have been inconsistent. Extracts from different plant parts have been show to have varying anticoagulant strengths, with water-based ones being more potent than alcohol-based extracts.

Likelihood Unlikely Evidence A
Mullein leaf extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Alcohol & Sugar-Free Mullein Leaf Liquid Extract, from the product label.

Swanson Premium Brand

See all Swanson Premium Brand products
Name
Swanson Health Products
City
Fargo
State
ND
ZipCode
58104
Phone Number
1-800-437-4148
Web Address
www.swansonvitamins.com
Pharmacist Counseling Corner

Alcohol & Sugar-Free Mullein Leaf Liquid Extract by Swanson Premium Brand: Common Questions

Does Alcohol & Sugar-Free Mullein Leaf Liquid Extract by Swanson Premium Brand interact with any medications?
Yes. Based on its ingredients, Alcohol & Sugar-Free Mullein Leaf Liquid Extract has a known interaction with 122 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Alcohol & Sugar-Free Mullein Leaf Liquid Extract 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.
Does mullein leaf extract really work for cough or bronchitis?
The evidence isn't established in the data we hold. While mullein is used traditionally for respiratory issues, there aren't enough reliable human studies yet to confirm it works for cough, bronchitis, asthma, or other conditions. Talk with your doctor about what you're trying to treat and what options have solid evidence behind them.
Can I take this if I'm on a blood thinner like warfarin or aspirin?
Mullein leaf does have mild blood-thinning effects, so it could theoretically add to what your blood thinner is already doing. Check with your doctor or pharmacist before starting it — they know your exact medication and dose and can tell you whether it's safe to combine.
Is mullein leaf safe during pregnancy or while breastfeeding?
There isn't enough safety data to recommend it during pregnancy or breastfeeding. Talk with your doctor or pharmacist if you're pregnant, planning to become pregnant, or nursing — they can help you decide what's right for your situation.
What are the side effects?
Mullein leaf extract is generally well tolerated, though human safety data are limited. A small number of case reports mention skin irritation (dermatitis) after direct contact with the plant or from breathing in plant dust, usually in people who also reacted to other plants.
What's in this besides the mullein?
The inactive ingredients are vegetable glycerin and purified water — no alcohol or added sugar, as the name says.

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

Not sure if Alcohol & Sugar-Free Mullein Leaf Liquid Extract is safe with your meds?

Our pharmacists answer your medication & supplement questions — free.

Ask a pharmacist

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.

Alcohol & Sugar-Free Mullein Leaf Liquid Extract label
Go deeper

The Full Monographs Behind Alcohol & Sugar-Free Mullein Leaf Liquid Extract’s Ingredients

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

Herb & supplement monograph

Mullein

Interacts with 122 drugs

Mullein is a traditional herbal remedy most often used as a tea or syrup to soothe coughs, sore throats, and respiratory irritation. High-quality human studies are lacking, so its benefits a...

Read the full Mullein monograph →
Sources

Sources & How We Checked

Alcohol & Sugar-Free Mullein Leaf Liquid Extract'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.

Mullein 2 references
  1. Castro AI, Carmona JB, Gonzales FG, Nestar OB. Occupational airborne dermatitis from gordolobo (Verbascum densiflorum). Contact Dermatitis 2006;55(5):301.
  2. Flores Echaiz C, Al Ali A, Cao AQ, Sasseville D. Simultaneous contact dermatitis caused by Asteraceae and Verbascum thapsus. Contact Dermatitis 2017;76(5):316-8.

See these in context on the Mullein 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

Keep exploring
Supplement interaction checker › Check any supplement or product against your medications Drug–drug interactions › Check two or more of your medications against each other Browse medications A–Z › Every drug we've checked against herbs & supplements NDC & pricing lookup › Find a drug’s NDCs, packaging and costs Ask a pharmacist › Free, personal answer from our licensed team