It is used for angina, in addition to other medications for congestive heart failure, and for esophageal spasms. It is available as an oral tablet both in extended release and slow release. The onset of action for<unk>  is thirty minutes and the onset of action for oral extended release is 12–24 hours. Long-acting nitrates can be more useful as they are generally more effective and stable in the short term.
Isosorbide dinitrate
Isosorbide mononitrate
Balsalazide
Minoxidil
Sodium nitroprusside
Telmisartan
Captopril
Nitroglycerin 