No known drug interactions for the matched ingredients — not a guarantee none exist. Check your meds →
Dietary supplement

Usnea Ingredients & Drug Interactions

by Supreme Nutrition Products

Usnea label
See full label image
Liquid Category: Botanical
No known interaction
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Usnea 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 No known interaction

Usnea is a dietary supplement by Supreme Nutrition Products with 1 active ingredient. Its ingredients are commonly taken for sore throat, skin and wound care, respiratory infections.We don’t currently list a known drug interaction for its mapped ingredients — but that doesn’t guarantee none exist, so always confirm with your pharmacist.

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HelloPharmacist Scorecard of Usnea by Supreme Nutrition Products

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: Usnea Lichen, a lichen traditionally used in herbal medicine. It comes as a liquid extract made with glycerin, distilled water, and cane alcohol as the inactive base.

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 Usnea product and its label doesn't state a use — see Usnea'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 Usnea isn't established in the data we hold. It's been studied for cough, pain, wound healing, fungal skin infections like athlete's foot, and weight loss, but none of those uses have sufficient reliable evidence to rate whether it actually works.

If you're considering it for one of those purposes, talk with your pharmacist or doctor about whether the science supports it for your situation.

The evidence, ingredient by ingredient Usnea

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.

Here's the key safety issue: when taken by mouth, Usnea contains usnic acid, which has been linked to liver damage — that's a serious concern. If you do use it orally, it's not something to take long-term without medical oversight.

Topical use on skin is much better tolerated, though it can cause local irritation, contact dermatitis, or conjunctivitis in some people. The safety data advises against use during pregnancy and breastfeeding.

Side effects, ingredient by ingredient Usnea

Meds to double-check

No known interactions
Known Interaction Concern · database check
No known interactions

No medication interactions are currently documented for the matched ingredients — that isn't a guarantee none exist.

Why this rating?
  • None of the 1 matched ingredient has a documented medication interaction on file.

No interactions are documented in our data for Usnea. Run your medications through the checker on this page to be thorough, but the bigger concern here is oral safety, not drug interactions.

The bottom line

Scorecard at a glanceFully disclosed formula with no assessable stated purpose. No medication interactions are currently documented, and safety information is well characterized.

Usnea has no documented interactions with medications we could check, but oral use carries a real liver-safety concern tied to its usnic acid content. If you're thinking about taking this by mouth, talk with your pharmacist or doctor first — topical use is a safer route if that fits your need.

Pregnant or breastfeeding people should avoid 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 Mar 25, 2025.

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 Usnea, straight from the product label.

Brand Supreme Nutrition Products
Barcode (UPC) 197644469222
Net contents 2 Fluid Ounce(s); 59 Milliliter(s)
Market status On market
Date entered into DSLD Mar 25, 2025
DSLD ID 327338
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other, Structure/Function
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 Usnea by Supreme Nutrition Products, 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:
10 Drop(s)
Maximum serving Sizes:
30 Drop(s)
Servings per container
49
UPC/BARCODE
197644469222
IngredientAmount% DV
Usnea Lichen1.2 mL--

Other ingredients: Glycerin, Water, Distilled, Cane 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.
Suggested/Recommended/Usage/Directions

Suggested use: 10-30 drops 3 times per day.

Precautions

Consult your physician before taking if pregnant or breastfeeding.

Keep out of reach of children.

FDA Disclaimer Statement

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

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

Usnea by Supreme Nutrition Products label

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

Usnea 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 Usnea by Supreme Nutrition Products

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

Serving size10 Drop(s) Dosage formLiquid Servings per container49 Amounts shown are per serving.

Usnea Lichen

No known
interactions
1.2 mL per serving

Usnea is a lichen used in traditional herbal medicine, mainly for sore throats, skin infections, and as a general antimicrobial. Laboratory studies su...

Usnea Lichen monograph & interactions

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

Interaction report

Usnea by Supreme Nutrition Products Drug Interactions

We don’t currently list any known drug interactions for the mapped ingredients in Usnea. This doesn’t guarantee none exist — always confirm with your pharmacist before combining a supplement with your medications.

The maker

Brand information

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

Supreme Nutrition Products

See all Supreme Nutrition Products products
Name
Supreme Nutrition Products
Street Address
1019 Regents Blvd #203
City
Tacoma
State
WA
ZipCode
98466
Web Address
www.SupremeNutritionProducts.com
Pharmacist Counseling Corner

Usnea by Supreme Nutrition Products: Common Questions

Does Usnea by Supreme Nutrition Products interact with any medications?
We do not currently list a known interaction for the mapped ingredients in Usnea. This does not guarantee none exist, so confirm with your pharmacist.
How can one product interact with so many drugs?
Usnea 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 this by mouth, or is it just for skin?
It's available as a liquid, so it's meant to be taken orally — but that's where the safety concern sits. Usnic acid, the active compound in Usnea, has been linked to liver damage when taken by mouth. Topical use on skin is much better tolerated. If you want to use Usnea, talk with your pharmacist about whether oral is right for you, or whether you should use it on skin instead.
Is Usnea safe while I'm pregnant?
No. The safety data advises against use during pregnancy because there isn't enough information to know whether it's safe. Talk with your doctor or pharmacist for personalized advice if you're pregnant or planning to be.
Can I breastfeed while taking this?
No. There isn't enough safety data, so it's advised against during breastfeeding. Your doctor or pharmacist can help you decide what's right for you and your baby.
Does Usnea actually work for cough or wounds?
The evidence isn't established in the data we hold. It's been studied for cough, wound healing, and other uses, but there's insufficient reliable evidence to say whether it really works. Your pharmacist can point you toward remedies with stronger evidence if that's what you're after.
What are the side effects I might notice?
Information is limited, but if you take it by mouth, the main concern is liver damage from usnic acid — that's serious and why oral use needs careful consideration. If you use it on skin, you might experience local irritation, contact dermatitis, or rarely conjunctivitis in sensitive people.

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

Not sure if Usnea 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.

Usnea label
Go deeper

The Full Monographs Behind Usnea’s Ingredients

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

Herb & supplement monograph

Usnea

Usnea is a lichen used in traditional herbal medicine, mainly for sore throats, skin infections, and as a general antimicrobial. Laboratory studies suggest its main compound, usnic acid, can...

Read the full Usnea monograph →
Sources

Sources & How We Checked

Usnea'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 10 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.

Usnea 10 references
  1. Favreau JT, Ryu Ml, Braunstein G, et al. Severe hepatotoxicity associated with the dietary supplement LipoKinetix. Ann Intern Med 2002;136:590-5. PubMed
  2. Ingolfsdottir K. Usnic acid. Phytochemistry 2002;61:729-36.
  3. Scirpa, P., Scambia, G., Masciullo, V., Battaglia, F., Foti, E., Lopez, R., Villa, P., Malecore, M., and Mancuso, S. [A zinc sulfate and usnic acid preparation used as post-surgical adjuvant therapy in genital lesions by Human Papillomavirus]. Minerva Gin
  4. Mitchell, J. C. Allergy to lichens. Allergic contact dermatitis from usnic acid produced by lichenized fungi. Arch Dermatol 1965;92(2):142-146.
  5. Durazo, F. A., Lassman, C., Han, S. H., Saab, S., Lee, N. P., Kawano, M., Saggi, B., Gordon, S., Farmer, D. G., Yersiz, H., Goldstein, R. L., Ghobrial, M., and Busuttil, R. W. Fulminant liver failure due to usnic acid for weight loss. Am.J Gastroenterol. PubMed
  6. Neff, G. W., Reddy, K. R., Durazo, F. A., Meyer, D., Marrero, R., and Kaplowitz, N. Severe hepatotoxicity associated with the use of weight loss diet supplements containing ma huang or usnic acid. J Hepatol. 2004;41(6):1062-1064. PubMed
  7. Hsu, L. M., Huang, Y. S., Chang, F. Y., and Lee, S. D. 'Fat burner' herb, usnic Acid, induced acute hepatitis in a family. J Gastroenterol.Hepatol. 2005;20(7):1138-1139. PubMed
  8. Arneborn, P., Jansson, A., and Bottiger, Y. [Acute hepatitis in a woman after intake of slimming pills bought via Internet]. Lakartidningen 7-11-2005;102(28-29):2071-2072.
  9. Sanchez, W., Maple, J. T., Burgart, L. J., and Kamath, P. S. Severe hepatotoxicity associated with use of a dietary supplement containing usnic acid. Mayo Clin Proc 2006;81(4):541-544. PubMed
  10. Rafanelli, S., Bacchilega, R., Stanganelli, I., and Rafanelli, A. Contact dermatitis from usnic acid in vaginal ovules. Contact Dermatitis 1995;33(4):271-272. PubMed

See these in context on the Usnea 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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