Lanoxin® (digoxin) is a prescription medicine that belongs to a class of drugs known as cardiac glycosides, more commonly called digitalis. If your healthcare provider has recommended Lanoxin, you may have questions about what it does and how it works.
In order to treat atrial fibrillation or congestive heart failure, Lanoxin plays a few different roles within the body. First, it works by increasing the amount of calcium and potassium inside heart cells. This helps the heart contract more forcefully with each heartbeat so that it is more efficient at pumping blood throughout the body. It also slows down the rate at which the heart beats.
(To learn more about what Lanoxin does, click Lanoxin Uses. This article talks in detail about how this medicine works to treat irregular heart rhythms and explains some of its "off-label" uses.)