The hooked vine of Uncaria rhyndzophylla (Miq.) Jack~, U macrophylia Wall.,
and U hirsuta Havil., family Rubiaceae.
Vine terete or square-columnar, with single or two downward opposite hooks
growing on the node, 1.0-2.5 cm in width. Surface red-brown to purple
red and smooth, or yellow-green to grey-brown and covered with yellow-brown
down. Hooks flat or rounded, with acute apex and broad base. Sweet in
taste, slightly cold in nature and attributive to liver, heart and pericardium
1. Clear away and calm the liver, expel wind and relieve spasm: For heat
syndrome with convulsion, especially infantile convulsion; for hyperactivity
or wind-transformation of liver-yang with dizziness, headache, restlessness,
and numbness, tremor and spasm of extremities; for serious liver-fire
syndrome manifested as epilepsy and insanity,used together with Lumbricus
and Cornu Saigae Tataricae.
2. Clear away liver-fire and improve visual acuity: For liver-heat syndrome
with conjunctivitis and headache.
3. Expel wind and clear away heat: For wind-heat affection with fever,
headache and conjunctival congestion, prurigo of wind-heat type.
Lower blood pressure: For hypertension, especially that attributive to
hyperactivity of liver-yang.
1. Its decoction lowers blood pressure in anesthetized or unanesthetized
2. Intraperitoneal injection of its decoction (0.1g/kg) exerts sedative
effect in mice.
3. Hypodermic injection of its alcoholic infusion (2g/kg) exerts an antiepileptic
effect in guinea-pigs.
Decoction: 10-15g (decocted later).
Its active components will be destroyed and the therapeutic effect reduced
after prolonged boiling.