Channels entered: Gallbladder, Liver, Pericardium, Triple Burner

• In animal experiments, a large dosage of Hare’s ear root had an antipyretic effect on artificially-induced fever.
• Oral preparations of Hare’s ear root have been shown to inhibit the increase in capillary permeability caused by histamine and 5-hydroxy-tryptamine, but have no protection effect against either histamine-induced or anaphylactoid shock.
• Preparations of Hare’s ear root have shown a bacteriostatic effect against Mycobacterium tuberculosis, as well as in vitro inhibitory effect against influenza and poliomyelitis viruses.
• Experiments indicate that preparations of Hare’s ear root can cause a lowering of the fever secondary to upper respiratory infections. In an uncontrolled clinical series of 143 patients, 98% had a reduction in temperature 24 hours after the onset of the flu, and 88% were fever free after one day.
• Oral ingestion of the saponins in Hare’s ear root had a tranquilizing effect in mice. It also had a strong antitussive effect that is thought to be central in nature.
• Preparations of Hare’s ear root slightly lowered the blood pressure in animals and had a negative inotropic effect on the heart.

Part used as medicine (Dried root)

• Contraindicated in cases of yin deficiency cough or Liver fire ascending to the head.
• May occasionally cause nausea or vomiting; should this occur, use only very small dose.