I found info on the Texas Heart Institure site - Commonly Used Brand Names in the United States are:
IMDUR (isosorbide mononitrate)
ISMO (isosorbide mononitrate)
Isordil (isosorbide dinitrate)
Monoket (isosorbide mononitrate)
Nitro-Dur (nitroglycerin)
Nitrolingual (nitroglycerin)
Nitrostat (nitroglycerin)
Sorbitrate (isosorbide dinitrate)

Commonly Used Brand Names in Canada are:
Apo-ISDN (isosorbide dinitrate)
Coronex (isosorbide dinitrate)
IMDUR (isosorbide mononitrate)
ISMO (isosorbide mononitrate)
Isordil (isosorbide dinitrate)
Nitrostat (nitroglycerin)

Then they have all the other info about nitrates and Medicines for Cardiovascular Disease. You may want to look this up.