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  • Search by Latin or common name (e.g., Achillea, yarrow).
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What an entry includes

  • Scientific + common names, parts used, primary actions, systems, preparations.
  • Safety snapshot and links to related Studies when available.
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Medical disclaimer: For general education only. Consult a qualified practitioner about individual use, especially with medications, pregnancy, or medical conditions.

Materia Medica A – Z

Our herbal encyclopedia with preparations, uses, safety notes, and research references.

Showing 1–15 of 15 entries (filtered).

E

Echinacea (narrow‑leaf) Coming soon
Safety: Details coming soon.
Echinacea (purple coneflower) Coming soon
Safety: Details coming soon.
Elder leaf (external) Coming soon
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Elderflower Coming soon
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Elecampane Coming soon
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Eleuthero Coming soon
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Enoki Coming soon
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Epazote Coming soon
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Epimedium (yin yang huo) Coming soon
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Epsom salt Coming soon
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Eriodictyon californicum (Torr.) Greene
Common name(s): Yerba Santa, California Yerba Santa, Bear Weed, Gum Bush / Gum Plant, Mountain Balm, Consumptive’s Weed
Anti-inflammatoryDemulcentExpectorantStimulant
Preparations: Tea (infusion), Tincture (alcohol extract), Syrup, Poultice
Safety: Yerba Santa is generally well tolerated when used traditionally in tea, tincture, or smoke form. There are no major toxicity reports in herbal literature. However: Mild stimulant effect may be noticed in higher doses. Not recommended in pregnancy or lactation due to lack of safety data. Resinous coating may cause digestive discomfort in sensitive individuals if taken in excess. Smoking leaves, while historically practiced for asthma, is not advised for modern therapeutic use due to lung irritation risks. Overall, yerba santa is considered low-risk when used responsibly and in moderation, preferably under guidance from a qualified herbalist.
Ethanol (ethyl alcohol) Coming soon
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Eucalyptus Coming soon
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Eucommia bark Coming soon
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Eyebright Coming soon
Safety: Details coming soon.