in a randomized cross-over study 16 patients with a history of asthma were given 0.48 g of theophylline-ethylenediamine ( te ) in the form of rapid intravenous infusion or a retention enema containing 400 mg theophylline , 600 mg diprophylline and 600 mg proxyphylline ( tdp ) .
C0004096
asthma
C0039771
theophylline