Comfry -Symphytum officinale
- H

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Externally as a poultice or balm to speed healing of closed wounds. Helps with arthritic joints, bruises, and similar ailments.
Internally as a tea to boost immune function short term or to increase urine output.


Generally considered too strong for young children.
Pregnant and breastfeeding women should avoid all internal use.
Can negatively impact nutrient balance for thiamin and calcium.
Long term use is strongly ill advised because it can lower healthy thyroid function, cause liver damage and potentially death.
Never use on open wounds because the skin may close faster than the inside of the wound and trap bacteria inside.
Possible drug interactions include anything broken down in the liver like acetaminophen.
Possible negative plant interactions include kava, skullcap, and valerian.

First Aid

If a suspected drug interaction has occurred call emergency services immediately, the severity can be deadly.
If a young child or pregnant woman has taken comfrey internally take activated charcoal within 20 minutes and call emergency services.

About the Remedy

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About the QRDS

Quick Reference Data Sheets™, QRDS hereafter, were created to put all essential information about a natural medicine in one place.
They are split into 6 sections, 5 of which you can see above. The omitted section is the chemical constituents. It has been left out of the online version because the majority of readers will not need it. It is included in the PDF.
QRDS are created from textbooks, scientific studies, a government database on natural plant materials and any other relevant resources.
The “Properties” section has the complete list of technical properties which may include some vague terms such as “pectoral”. Vague terms are included to help users assess personal risk of drug interactions with medications not listed on the QRDS.
If a medication affects the same area the risk of an interaction increases compared to a medication that affects a completely different area of the body.
Very rarely there will be a term with no definition available. Those have been left in the hope of finding an obscure reference so I could replace the word with a modern version if appropriate.
The QRDS are given freely for personal use only. Redistributing them in any form, free or otherwise, will result in legal action.