metoprolol , a cardioselective beta-receptor blocker , was administered to 12 patients three to ten hours after sustaining a transmural myocardial infarction , and the effect of the drug ( 10 mg i.v. , followed by 50 mg orally every eight hours ) was followed for 48 hours .
C0025859
metoprolol
C0027051
myocardial infarction