antitussive ed50s ( with 95 % confidence limits ) for inhibition of cough induced by citric acid vapour were for codeine , morphine and bw443c respectively , 9.1 ( 5.8-15 ) , 1.3 ( 0.7-2.4 ) and 1.2 ( 0.6-2.6 ) mg kg-1 s.c. and 8.7 ( 4.2-12 ) , 1.6 ( 1.2-1.9 ) and 0.67 ( 0.002-3.3 ) mg kg-1 , i.v .
C0010200
cough
C0009214
codeine