Functions:

To release the exterior, resolve dampness, regulate qi and harmonize the middle qi. Used for wind-cold, internal dampness stagnation or summer dampness, manifested as headache, dizziness, heavy sensation, stuffiness and oppression in the chest and hypochondrium, distending pain in the stomach and abdomen, vomiting and diarrhoea. 

Dosage and Administration:

Orally. 6g a time and twice a day.