the actions of four ca2+-antagonists ( nifedipine , verapamil , diltiazem and d 600 ) were compared with those of four substances that are used clinically in treating asthma ( theophylline , isoproterenol , disodium cromoglycate and clemastine ) , using the passive cutaneous anaphylaxis ( pca ) reaction in the rat .
C0004096
asthma
C0039771
theophylline