Synonyms/Common Names/Related Substances:
- Asteraceae (family), August flower, California gumplant, grindelia, Grindelia camporum, Grindelia robusta, Grindeliae herba, Grindelie, gum plant, gumplant, gum weed, hardy grindelia, rosin weed, scaly grindelia, tar weed, tarweed.
Clinical Bottom Line/Effectiveness
Brief Background:
- Gumweed is a traditional medicine of California Native Americans, such as the Chumash people (1). Gumweed was used clinically from the 1880s until 1960 in the United States and the United Kingdom for the treatment of asthma, bronchitis, and poison ivy rash (2;3;4). Gumweed use in clinics was discontinued in 1960 when law required medicines to have proven efficacy in clinical trials. The plant contains grindelane diterpenoids of unknown pharmacological activity.
- There are no high quality trials supporting the use of gumweed for asthma, bronchitis, dermatitis, or any other condition. High quality clinical trials of gumweed are needed in these areas.
Dosing/Toxicology
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Precautions/Contraindications
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Interactions
Most herbs and supplements have not been thoroughly tested for interactions with other herbs, supplements, drugs, or foods. The interactions listed below are based on reports in scientific publications, laboratory experiments, or traditional use. You should always read product labels. If you have a medical condition, or are taking other drugs, herbs, or supplements, you should speak with a qualified healthcare provider before starting a new therapy.
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Mechanism of Action
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History
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Evidence Discussion
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Products Studied
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Author Information
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References
Natural Standard developed the above evidence-based information based on a thorough systematic review of the available scientific articles. For comprehensive information about alternative and complementary therapies on the professional level, go to www.naturalstandard.com. Selected references are listed below.
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