Periostracum Cicadae


The exuviae of nymph during emergence of Cryptotympana pustulata Fabricius, family Cicadidae.

The shell like a cicada, hollowed, yellow-brown, semiopaque, lustrous, coriaceous and elastic; composed of three portions, i.e., head, chest and abdomen. A pair of compound eyes on the head, two pairs of wings and a crossed gap on the chest, and three pairs of feet on both sides of the abdomen. Sweet in taste, cold in nature, and attributive to lung and liver channels.

I. Expel wind and cold: For common cold of wind-heat type and early stage of seasonal febrile diseases, especially for those with sore throat and hoarseness, and children with fever and restlessness.
2. Let out the skin eruption and alleviate itching: For early stage of eruptive diseases with incomplete eruption and skin itching, usually used together with Herba Menthae, Herba Schizonepetae, etc.
3. Expel wind and relieve spasm: For tetanus, febrile diseases complicated by convulsion and infantile convulsion.
4. Improve eyesight and remove nebula: For conjunctivitis of wind-heat type an nebula. Recently used for cataract and corneal opacity.

Pharmacological Action
1. Decreasing the tension of striated muscles and acting as a ganglionoplegic in experimental animals.
2. Synergic with hexobarbital.
3. Antagonizing convulsive effect of strychnine, cocaine and nicotine.

Administration Decoction: 3-10g.


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