Isordil, Generic Isordil, Isosorbide Dinitrate is in a class of drugs called nitrates.

Isosorbide Dinitrate dilates (widens or relaxes) blood vessels (arteries and veins).

When blood vessels are dilated, it is easier for the heart to pump.

Also, more blood, which is rich in oxygen, can flow to the heart.

Isosorbide Dinitrate is used to treat attacks of angina (sublingual and chewable tablets) and to prevent attacks of angina from occurring (capsules and tablets).