The primary care NP is preparing to prescribe isosorbide dinitrate sustained release (Dilatrate SR) ...

B
Long-acting nitrates should be considered to treat chronic, stable angina. The main limitation is tolerance, which can be limited by providing a nitrate-free period of 6 to 10 hours each day. The medication should be taken on an empty stomach, 30 to 60 minutes before a meal. An appropriate initial dose of isosorbide dinitrate is 40 mg every 12 hours. This dose can be increased as needed. Isosorbide mononitrate is given on awakening and again 7 hours later. The medication is not given four times daily. Dosing may be increased to 80 mg tid, and the dosing schedule of 8:00 AM, 1:00 PM, and 6:00 PM. would be appropriate at that point.