Q: Why aren’t antihypertensive medications in time-release form, so they have the potential to provide benefits longer in a day?
A: Many factors have to be considered in making medication. (See How Medicines Work fact sheet) Some drugs are not suitable for time release. In others, time release is not needed because it takes your body so long to process the drug. A steady amount of the drug can be maintained in the blood stream by taking the drug at the same time of day every day. Most blood pressure medicines are in this category.