theophylline was administered to six beagles intravenously ( aminophyllin injectable , searle laboratories ) and orally as four sustained-release formulations ( choledyl -sa tablets , parke-davis ; theo-dur tablets , key pharmaceuticals ; theo-24 capsules , searle laboratories , and slo-bid gyrocaps , william h. rorer , inc. ) .
C0039771
theophylline
C0700825
theo-24