Isosorbide Dinitrate is a medication that is commonly prescribed for individuals with heart conditions or hypertension. Other synonyms for this medication include Isordil, Dilatrate-SR, and Sorbitrate. It is important to note that these medications may have slight differences in their chemical makeup or mode of action, but they are all used to treat similar conditions. Isosorbide Dinitrate works by relaxing the blood vessels in the body, which improves blood flow and reduces the workload on the heart. Patients who are prescribed this medication should take it exactly as directed by their healthcare provider and should be aware of any potential side effects or drug interactions.