Skip to content
Photo of Xanthium Fruit

Xanthium Fruit

蒼耳子 · Cāng Ěr Zǐ

Clears blocked nasal passages and drains sinus congestion

Properties

WarmingWarming botanicalSweet, Bitter

What it does

If your nose is stuck with thick, viscous mucus that will not drain, xanthium fruit is one of TCM's primary herbs for it. It disperses wind, dries dampness, and unblocks the nasal passages, which makes it the chief herb in Xanthium Powder for what modern medicine calls chronic sinusitis. The discharge it suits is thick, turbid, or foul-smelling. It also draws dampness out of skin and sore joints.

Safety

  • Toxic. Do not exceed 9g per day, and keep it away from children: a fatal case is documented in a young child.
  • Overdose can cause liver failure, kidney failure, convulsions, loss of consciousness, and death.
  • Milder overdose signs are vomiting, abdominal pain, and diarrhea. Stop immediately if they appear.
  • Short courses only. Bensky warns that long-term use of this herb must be strictly avoided.
  • Use the dry-fried form (chǎo cāng ěr zǐ). The raw fruit is substantially more toxic.
  • Avoid during pregnancy. This is a precaution given the herb's toxicity, not a documented finding.
  • No AHPA monograph exists for this herb, so it is unclassified rather than cleared as safe.

How to take it

DrinkCapsule

Use the dry-fried form and decoct 3–9g in 3 cups for 20–25 minutes. Strain and drink warm, up to twice daily. Never exceed 9g per day: read the safety notes before starting.

Combine 6g with 6g magnolia flower bud and 6g angelica dahurica root for a week-long course for chronic sinus congestion

Follow the label dose exactly and never stack capsules on top of a decoction. Capsules avoid the bitter taste, but they also make it easy to overshoot a herb that is toxic in excess.

Use for a short course while symptoms flare, not continuously through allergy season

Where it comes from

Xanthium fruit first appears in the Divine Husbandman's Classic of the Materia Medica, one of TCM's oldest texts. Its Chinese name Cāng Ěr Zǐ means 'deep green ear seeds,' referring to the spiky burr that catches on clothing and animal fur. The small spiny fruit is processed before use to reduce its inherent toxicity. It has been the cornerstone of Xanthium Powder for nasal congestion since the Song dynasty, around 1253 CE.