two tablets of aminophylline ( each 350 mg ) or of a mixture ( 75 mg theophylline , 112,5 mg diprophylline , 112,5 mg proxyphylline per tablet ) were given to 12 patients with reversible air-flow obstruction and their effects on lung function , blood pressure and pulse rate were surveyed for eight hours as an intra-individual randomized cross-over experiment .
C0039771
theophylline
C0013360
diprophylline