Thirty - six cases were treated with Fufang Xiebai （FX） capsule and compared with control group. There was significant difference （P<0. 05） in the amelioration of signs and symptoms such as coughing

asthma

and wheezing rales

the total effective rate being 91. 7%. It also improved the ventilation of the lungs and lowered the pulmonary arterial pressure. Animal experiments revealed that FX increased the contents of plasma PGI2

inhibit TXA2 in rats. When compared with the control group treated with nifedipine

it markedly improved the re -organization of pulmonary vessels and decreased the pathology of right heart hypertrophy

indicating that the methods of communicating Yang and eliminating Bi - syndrome yielded actions of antitussive and depressing cough

releasing spasm and eliminating asthma

and lowering pulmonary hypertension.