on use of a nitrate-free treatment interval employing a regimen of 20 mg isdn nonsustained-release form twice daily in the morning and at midday , 120 mg isdn sustained-release form once daily or 50 or 100 mg isosorbide 5-mononitrate once daily , maintained effectiveness has been documented , as it has also been shown for treatment with ntg patches delivering 10 mg per 24 hours on incorporation of a 12-hour patch-free interval .
C0028125
nitrate
C0064079
isosorbide 5-mononitrate