angina frequency was lower with isosorbide mononitrate than with sustained-release glyceryl trinitrate in 33 ( 69 % ) of the patients , but lower with sustained-release glyceryl trinitrate than with isosorbide mononitrate in only 3 ( 6 % ) patients ( p less than 0.001 ) .
C0002962
angina
C0017887
glyceryl trinitrate