Yarrow

Research corpus coverage

Chemistry notes

• CHEMISTRY: Relevant reported constituents include sesquiterpene lactones; flavonoids; volatile oil; constituent presence alone does not establish clinical efficacy.

Traditional / historical use

Documented traditional use — not a claim of established efficacy.

• TRADITIONAL: Yarrow has been used for minor wounds; digestive spasm; menstrual complaints; this records historical/traditional use and does not establish efficacy.

  MODERATE · regulatory monograph · EMA European Union herbal monographs and list entries

Modern evidence

• EVIDENCE: For the major use set (minor wounds; digestive spasm; menstrual complaints), the evidence assessment is insufficient: Insufficient clinical evidence; traditional-use/regulatory evidence predominates.

  LOW · regulatory monograph and mixed scientific literature · EMA European Union herbal monographs and list entries

Forms used traditionally

A listed form does not imply it suits every plant part, or that one preparation is interchangeable with another — see the plant’s own notes below.

Cats

• Caution

  ASPCA lists yarrow (Achillea millefolium; family Asteraceae) as toxic to cats.

  Intrinsic toxicity · UNKNOWN · Not stated; no preparation or concentration distinction provided · HIGH · poison_control_database · Yarrow - Toxic and Non-toxic Plants - ASPCA

Dogs

• Caution

  Yarrow (Achillea millefolium) is listed under “Plants Toxic to Dogs.” No cat-specific evidence or plant-specific toxicology details are provided.

  Intrinsic toxicity · UNKNOWN · Not stated; whole plant or plant group listing only · HIGH · poison_control_database · Toxic and Non-Toxic Plant List — Dogs - ASPCA

• Caution

  ASPCA lists yarrow (Achillea millefolium; family Asteraceae) as toxic to dogs.

  Intrinsic toxicity · UNKNOWN · Not stated; no preparation or concentration distinction provided · HIGH · poison_control_database · Yarrow - Toxic and Non-toxic Plants - ASPCA

Additional safety notes (general, unstructured)

Free-text safety notes carried from their source — not broken out by species, route, or hazard type, and not equivalent to the structured records above. Each note names the kind of source it came from.

• SAFETY: Major issues include Asteraceae allergy; photosensitivity/contact dermatitis possible. Contraindications/cautions include Asteraceae allergy.

  MODERATE · regulatory monograph · EMA European Union herbal monographs and list entries

• SAFETY: Clinically relevant interaction concerns include Possible additive anticoagulant and sedative effects.

  MODERATE · regulatory monograph · EMA European Union herbal monographs and list entries

  Some interactions are theoretical or based on case reports/pharmacokinetics rather than outcome trials.

• SAFETY: Pregnancy/lactation reference: Avoid medicinal use in pregnancy; insufficient lactation data.

  MODERATE · regulatory monograph or evidence synthesis · EMA European Union herbal monographs and list entries

  Absence of evidence is not evidence of safety.

• ASPCA lists yarrow (Achillea millefolium; family Asteraceae) as toxic to cats.

  HIGH · poison_control_database · Yarrow - Toxic and Non-toxic Plants - ASPCA

  The page does not specify an exposure route, affected organ system, or whether toxicity varies by preparation or concentration.

• Yarrow (Achillea millefolium) is listed under “Plants Toxic to Dogs.” No cat-specific evidence or plant-specific toxicology details are provided.

  HIGH · poison_control_database · Toxic and Non-Toxic Plant List — Dogs - ASPCA

  Family is listed as Compositae / Asteraceae.

• ASPCA lists yarrow (Achillea millefolium; family Asteraceae) as toxic to dogs.

  HIGH · poison_control_database · Yarrow - Toxic and Non-toxic Plants - ASPCA

  The page does not specify an exposure route, affected organ system, or whether toxicity varies by preparation or concentration.

Taxonomic identity note

• Yarrow is treated here as Achillea millefolium L. in the family Asteraceae; recorded older names include Achillea lanulosa Nutt..