What is it used for?
Traditionally used in Herbal Medicine to help relieve sore throats (Hoffmann 1996; Felter and Lloyd 1983; Wren 1907; Meyrick 1790).
Traditionally used in Herbal Medicine (as an astringent) to help relieve diarrhea [Source note 2]
Traditionally used in Herbal Medicine (as an astringent) to help relieve haemorrhoids (Hoffmann 1996; Grieve 1971; Wren 1907; Meyrick 1790).
The above uses can be combined on the product label if from the same traditional or non-traditional system of medicine (e.g., Traditionally used in Herbal Medicine as an astringent to help relieve diarrhea and haemorrhoids).
For multi-ingredient products:
To prevent the product from being represented as a “traditional medicine”, any indicated traditional use claim must refer to the specific active ingredient(s) and recognized traditional system of medicine from which the claim originates when 1) both traditional and modern claims are present or 2) when claims originate from multiple systems of traditional medicine (e.g., Heal-all is traditionally used in Herbal Medicine to help relieve sore throats).
When ALL of the active ingredients (MIs) in the product are used within the SAME identified system of traditional medicine AND the product makes ONLY traditional claims, listing of MIs in the traditional claim(s) is not required.
Who does this guide cover?
Adults 18 years and older
How is it taken?
Oral
Which forms are covered?
this reference excludes foods or food-like dosage forms as indicated in the Compendium of references Guidance Document.
Quantities
Methods of preparation: Dry*, Powdered*, Non-Standardized Aqueous Extracts (Dry extract, Decoction, Decoction concentrate, Infusion, Infusion concentrate)
28 – 32 grams of dried shoots and/or leaves, per day [Source note 3].
Note: Dried or powdered shoots and/or leaves should be prepared as an infusion or decoction by consumers prior to use (see direction for use).
Methods of preparation: Non-Standardized Ethanolic Extracts (Dry extract, Tincture, Fluid extract)
0.75 – 3 grams of dried shoots and/or leaves, per day [Source note 4].
How is it used?
Loose dosage form (for infusion/decoction)*
Place [insert volume to be measured by consumer, e.g., X teaspoons] of dried shoots/shoots and leaves/leaves [insert the volume of water, e.g., 1 cup (250 mL)] of boiling/cold water. Infuse for [e.g., 5-15 minutes]/Bring to a boil and let simmer for [e.g., 10-20 minutes]. Strain and drink [Source note 5].
*Note: The direction for use statement can be modified on the label provided it gives clear instructions to consumers.
How long is it used?
The reference does not require an additional label statement in this section. This does not establish an absence of risk.
Warnings and precautions
Ask a healthcare professional if symptoms persist or worsen.
When should it be avoided?
The reference does not require an additional label statement in this section. This does not establish an absence of risk.
Possible side effects
The reference does not require an additional label statement in this section. This does not establish an absence of risk.
Storage
Must be established in accordance with the requirements described in the applicable product regulations.
Preparation details
Ingredient identity, preparation requirements, and other details that define the scope of this guide.
Ingredients and preparations
| Proper name(s) | Common name(s) | Source information / Source material(s) | Source information / Part(s) | Source information / Preparation(s) |
|---|---|---|---|---|
| Prunella vulgaris |
| Prunella vulgaris |
| Dry |
References: Proper name: USDA 2024; Common names: USDA 2024; Gardner and McGuffin 2013; Meyer 1993; Lust 1987; Source information: Bartram 1998; Hoffmann 1996.
Other ingredients
Must be chosen from the current source ingredient database and must meet the limitations outlined in the database.
Preparation and quality requirements
The finished product specifications must be established in accordance with the requirements described in the source authority source’s product quality guidance.
The active ingredient must comply with the requirements outlined in the source ingredient database.
Guide change history
Updates to this SupplementSafety.org guide.
Minor updates
Updated guide wording, organization, and source presentation. Added our editorial change history.
Initial release
Initial SupplementSafety.org guide prepared from source reference material.
Validation: Not yet completed. Editorial updates do not constitute clinical validation.
Sources
Source information
This guide organizes source material about uses, preparations, amounts, and precautions. Read the conditions alongside each statement; the information may apply only to particular preparations or populations.
The source document includes supporting references. We have not independently summarized or assessed every cited study for this guide.
- Source document version
- February 27, 2026
- Source captured
- Aug 15, 2026
- Editorial work
- Editorial preparation. Independent clinical review has not been recorded for this guide.
Full citations are available through the link above. Verification is required to open them; reading this guide does not require verification.
Taking a medication too?
Explore our supplement–medication interaction checker. Its coverage and review status are shown with the results; a missing finding does not establish that a combination is safe.