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Dietary supplement

Mullein Leaf Ingredients & Drug Interactions

by Cedar Bear

Mullein Leaf 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 Mullein Leaf 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

Mullein Leaf is a dietary supplement by Cedar Bear 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. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Mullein Leaf by Cedar Bear

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

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HelloPharmacist Scorecard of Mullein Leaf by Cedar Bear

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 Aug 20, 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.
  • “Proprietary Blend” is a proprietary blend — the label gives one combined amount (0.50 mL) without saying how much of each component you get.

Cedar Bear's Mullein Leaf is a single-ingredient liquid formula: mullein in a proprietary blend. The liquid is made with USP-grade vegetable glycerine and purified water 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 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 isn't established in our data. We hold insufficient reliable evidence to rate it for bronchitis, asthma, migraine headache, cough, or diarrhea — uses it's sometimes promoted for, but studies haven't been solid enough to confirm whether it actually works for any of these.

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 is generally well tolerated for short-term use, though human safety data are limited. A small number of case reports describe dermatitis (a skin reaction) after direct contact with the whole plant or inhalation of plant dust — worth knowing if you handle it occupationally or apply it to skin.

The safety data advise against mullein during pregnancy and while breastfeeding because there isn't enough information to confirm it's safe in either situation. If you're pregnant, nursing, or planning to be, talk with your doctor or pharmacist before taking it.

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.

Before you take this, double-check any blood thinners (anticoagulants) or antiplatelet drugs you're on — mullein has mild blood-thinning effects and could add to their impact, raising bleeding risk.

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

Mullein is generally well tolerated for short-term use but has limited human safety data. The main concern is a Minor interaction with blood thinners and antiplatelet drugs — if you take any of those, check your specific medications first.

For any questions about whether it's right for you or how it fits with your health, talk with your doctor or pharmacist.

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 Nov 21, 2020.

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 Mullein Leaf, straight from the product label.

Brand Cedar Bear
Barcode (UPC) 834711004060
Net contents 60 mL; 2 fl. Oz.
Market status On market
Date entered into DSLD Nov 21, 2020
DSLD ID 239297
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Vegan, Vegetarian, Adult (18 - 50 Years), Kosher, Gluten Free, 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 Mullein Leaf by Cedar Bear, 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:
0.5 mL
Maximum serving Sizes:
0.5 mL
Servings per container
120
UPC/BARCODE
834711004060
IngredientAmount% DV
Proprietary Blend0.5 mL--
Mullein0 NP--

Other ingredients: USP Grade Vegetable Glycerine, 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.
Formulation

Manufactured in the USA

True Alcohol Free Sugar Free Gluten Free

Vegan

Suggested/Recommended/Usage/Directions

Suggested Use: .5 mL (10 drops) 1 to 3 times a day, or as needed. Shake well.

Precautions

Note: Consult your physician before use.

FDA Disclaimer Statement

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

Seals/Symbols

GMP Good Manufacturing Practices K (Kosher)

Formula

K (Kosher)

Verbascum spp.

General Statements

Herbal Single

FDA Statement of Identity

Dietary Supplement

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

See for yourself

Mullein Leaf by Cedar Bear label

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

Mullein Leaf 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 Mullein Leaf by Cedar Bear

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

Serving size0.5 mL Dosage formLiquid Servings per container120 Amounts shown are per serving.

Proprietary Blend

0.5 mL per serving

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

Interaction report

Mullein Leaf by Cedar Bear Drug Interactions

Want to check YOUR meds against Mullein Leaf?

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 122

Individual Drug Interactions

The ingredients in Mullein Leaf interact with 122 drugs. Click any drug to see the details.

1 of the 1 ingredient in Mullein Leaf interact with drugs. Each result below shows which ingredient is responsible. Mullein

Each ingredient & the kinds of drugs it affects

For each ingredient in Mullein Leaf 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.

Mullein1 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 full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Mullein Leaf, from the product label.

Cedar Bear

See all Cedar Bear products
Name
Cedar Bear Naturales INC
Street Address
PO Box 158
City
Roosevelt
State
UT
ZipCode
84066
Phone Number
1-888-854-3727
Web Address
Cedarbear.com
Pharmacist Counseling Corner

Mullein Leaf by Cedar Bear: Common Questions

Does Mullein Leaf by Cedar Bear interact with any medications?
Yes. Based on its ingredients, Mullein Leaf 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?
Mullein Leaf 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 take Mullein Leaf if I'm pregnant or breastfeeding?
The safety data advise against it in both cases because there isn't enough information to know it's safe. Talk with your doctor or pharmacist about your situation before taking it.
Does mullein actually work for cough or bronchitis?
We don't have reliable evidence to confirm it does. The studies on mullein for those uses aren't strong enough yet to say whether it works.
What's in this liquid formula?
It's mullein in a proprietary blend, with vegetable glycerine and purified water as the liquid base.
Can I get a skin reaction from this supplement?
Direct contact with the mullein plant itself has caused dermatitis in a few reported cases, especially with topical exposure. The liquid form is unlikely to pose that risk, but it's worth knowing if you handle the plant directly.
Is mullein safe for long-term use?
Human safety data are limited, and we only have good tolerance information for short-term use. If you're thinking of taking it for weeks or months, talk with your doctor or pharmacist first.

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

Not sure if Mullein Leaf is safe with your meds?

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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.

Mullein Leaf label
Go deeper

The Full Monographs Behind Mullein Leaf’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

Mullein Leaf'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

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