18 subjects were given isosorbide dinitrate ( isdn ) 5 mg sublingually and serum concentrations of isdn , 2-isosorbide mononitrate ( 2-ismn ) and 5-isosorbide mononitrate ( 5-ismn ) were measured , as well as changes in digital plethysmographic amplitude , heart rate , ecg , blood pressure and schellong 's test .
C0022252
isdn
C0064079
5-ismn