after pretreatment of pigs with a combination of the h1- and h2-receptor antagonists terfenadine and cimetidine , the vascular and bronchial responses were strongly reduced to both histamine ( by greater than 77 % ) and ascaris ( by greater than 58 % ) , but not to capsaicin aerosol .
C2757005
h2-receptor
C0008783
cimetidine