Which statement best describes the use of Isosorbide Mononitrate?

Isosorbide Mononitrate is a medication commonly used as a long-acting nitrate to prevent chest pain (angina) typically related to heart conditions. It works by dilating blood vessels, which reduces blood flow to the heart and, consequently, decreases the heart's workload.

The correct choice highlights that this medication can be cut in half but must be swallowed whole. This is significant because the formulation of Isosorbide Mononitrate allows for some flexibility in dosing; however, it is crucial to ensure that it is swallowed without being chewed or crushed to maintain its intended release mechanism.

The other statements do not accurately reflect the correct use of Isosorbide Mononitrate. For instance, it is not meant for the acute relief of chest pain, as that would require a different class of medications, such as nitroglycerin. Daily use is not prohibited; in fact, it is often prescribed for daily use to prevent angina. Additionally, Isosorbide Mononitrate is not intended for use only when needed; it is used on a scheduled basis for preventive therapy rather than for immediate relief.