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Dietary supplement

Full Spectrum Mullein Leaf 500 mg Ingredients & Drug Interactions

by Swanson Premium Brand

Full Spectrum Mullein Leaf 500 mg label
See full label image
Capsule 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 Full Spectrum Mullein Leaf 500 mg 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

Full Spectrum Mullein Leaf 500 mg 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. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Full Spectrum Mullein Leaf 500 mg by Swanson Premium Brand

Ask about any prescription or over-the-counter medication and we check it for interactions with Full Spectrum Mullein Leaf 500 mg by Swanson Premium Brand — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of Full Spectrum Mullein Leaf 500 mg 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 30, 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 at 500 mg per capsule. Mullein is a plant traditionally used to support respiratory health.

The capsule itself is made from gelatin, which is the only inactive ingredient listed on the label.

Does it work?

Not established
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 established

The graded evidence we hold for these ingredients covers different conditions than the ones this product is marketed for, so there's no established rating for its stated use — see Mullein's own graded uses on its monograph.

Why this rating?
  • The label markets this product for: respiratory health and cough support.
  • We looked for evidence on: Asthma, Bronchitis, Cough, Influenza, Pneumonia, chest congestion — and 2 related terms.
  • The closest evidence on file: Mullein is rated "Insufficient Reliable Evidence To Rate" for Bronchitis (Natural Medicines).
  • Also on file: Mullein is rated "Insufficient Reliable Evidence To Rate" for Asthma, Cough, Influenza, Pneumonia.

The evidence for mullein isn't established in our data. We hold insufficient reliable evidence to rate it for bronchitis, asthma, cough, migraine headache, or diarrhea — the main uses people reach for it.

That doesn't mean it doesn't work; it means good human studies haven't been done yet, or the ones available don't meet a standard bar. If you're considering it for a specific symptom, that's worth discussing with your doctor or pharmacist.

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, so we don't know much about long-term use. A small number of case reports describe dermatitis (skin irritation) from direct contact with the plant or inhaled dust — both rare.

If you have a plant allergy, that's worth keeping in mind. The safety data advise against mullein during pregnancy and while breastfeeding.

There isn't enough information to know whether it's safe in either situation, so talk with your doctor or pharmacist if you're pregnant, planning to become pregnant, or nursing before you take this.

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.

If you take blood thinners (anticoagulants) or antiplatelet drugs — including aspirin, warfarin, clopidogrel, or similar medications — check with your doctor or pharmacist before adding mullein. Lab studies show it has mild blood-thinning properties, and combining it with your medication could add up.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no established evidence rating for its marketed use. Only minor medication interactions are documented, and safety information is well characterized.

Mullein is a traditional respiratory herb, but we don't have solid evidence it works for any specific condition yet. It's generally well tolerated short-term, though it does have a mild blood-thinning effect — important to know if you're on anticoagulants or antiplatelets.

If you take any blood thinner or are pregnant or breastfeeding, check with your doctor or pharmacist before starting. It's a good idea to verify it with your exact medications using the tool on this page.

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 Sep 21, 2017.

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 Full Spectrum Mullein Leaf 500 mg, straight from the product label.

Brand Swanson Premium Brand
Barcode (UPC) 087614112046
Net contents 60 Capsule(s)
Market status On market
Date entered into DSLD Sep 21, 2017
DSLD ID 78911
Product type Botanical
Supplement form Capsule
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 Full Spectrum Mullein Leaf 500 mg 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 Capsule(s)
Maximum serving Sizes:
1 Capsule(s)
UPC/BARCODE
087614112046
IngredientAmount% DV
Mullein500 mg--

Other ingredients: Gelatin, May contain one or more of the following

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

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 capsule two times per day with water.

General

SW1204 Rev 0 04 12 17

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

See for yourself

Full Spectrum Mullein Leaf 500 mg by Swanson Premium Brand label

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

Full Spectrum Mullein Leaf 500 mg 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 Full Spectrum Mullein Leaf 500 mg by Swanson Premium Brand

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

Serving size1 Capsule(s) Dosage formCapsule Amounts shown are per serving.

Mullein

Interacts with
122 drugs
500 mg 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 monograph & interactions

Other (inactive) ingredients: Gelatin, May contain one or more of the following. These complete the product’s ingredient list but are not active constituents.

Interaction report

Full Spectrum Mullein Leaf 500 mg by Swanson Premium Brand Drug Interactions

Want to check YOUR meds against Full Spectrum Mullein Leaf 500 mg?

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 Full Spectrum Mullein Leaf 500 mg interact with 122 drugs. Click any drug to see the details.

1 of the 1 ingredient in Full Spectrum Mullein Leaf 500 mg interact with drugs. Each result below shows which ingredient is responsible. Mullein

Each ingredient & the kinds of drugs it affects

For each ingredient in Full Spectrum Mullein Leaf 500 mg 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 Full Spectrum Mullein Leaf 500 mg, 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

Full Spectrum Mullein Leaf 500 mg by Swanson Premium Brand: Common Questions

Does Full Spectrum Mullein Leaf 500 mg by Swanson Premium Brand interact with any medications?
Yes. Based on its ingredients, Full Spectrum Mullein Leaf 500 mg 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?
Full Spectrum Mullein Leaf 500 mg 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 mullein safe to take while pregnant or breastfeeding?
The safety data advise against mullein during pregnancy and while breastfeeding because there isn't enough information to know whether it's safe. If you're pregnant, planning to become pregnant, or nursing, talk with your doctor or pharmacist before taking this supplement.
Does mullein actually work for cough, bronchitis, or asthma?
We hold insufficient reliable evidence to say whether mullein works for those conditions. Good human studies haven't been done yet, or the available ones don't meet our standard. That's a conversation to have with your doctor if you're considering it for a specific symptom.
Can mullein cause any side effects?
Mullein is generally well tolerated. A small number of case reports describe skin irritation from direct contact with the plant or inhaled dust, but those are rare. If you have plant allergies, that's something to be aware of.
What is mullein leaf used for?
Mullein is a plant traditionally used to support respiratory health, though we don't have solid evidence yet for specific conditions like cough, bronchitis, or asthma.
I take a blood thinner — is mullein okay for me?
Lab studies show mullein has mild blood-thinning effects. If you take any blood thinner or antiplatelet drug — including aspirin, warfarin, or clopidogrel — check with your doctor or pharmacist before starting mullein to make sure it's right for you.

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

Not sure if Full Spectrum Mullein Leaf 500 mg 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.

Full Spectrum Mullein Leaf 500 mg label
Go deeper

The Full Monographs Behind Full Spectrum Mullein Leaf 500 mg’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

Full Spectrum Mullein Leaf 500 mg'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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