Sea clam shell (Haigeqiao)
Pharmaceutical Name: Concha Meretricis seu Cyclinae
Zoological Name: 1. Cyclina sinensis Gmelin. 2. Meretrix meretrix L.
Common Name: Clam shell
Source of Earliest Record: Shennong Bencao Jing
Part Used: The clam shells are collected from the seashore and pounded into powder.
Natural Properties & Taste: Bitter, salty and cold
Meridians: Lung and stomach
1. To clear heat in the lungs and resolve phlegm.
2. To soften hardness and release nodules
1. Phlegm-heat cough manifested as cough with thick yellow sputum, asthma, chest pain and hypochondriac pain. Sea clam shell (Haigeqiao) is used with Costazia bone (Haifushi), Swallowwort rhizome (Baiqian), Mulberry bark (Sangbaipi), Capejasmine (Zhizi) and Trichosanthes fruit (Gualou).
2. Scrofula and goiter. Sea clam shell (Haigeqiao) is used with Laminaria (Kunbu), Seaweed (Haizao) and Ark shell (Walengzi) in the formula Hanhua Wan.
Dosage: 10-15 g
Cautions & Contraindications: This substance is normally used in powdered form and should be placed in a cloth bag for decoction or removed from the decoction with a strainer.