Metildigoxin is a medication commonly used to treat heart problems such as congestive heart failure and atrial fibrillation. It belongs to a class of drugs known as cardiac glycosides. Although it is commonly referred to as metildigoxin, it is also known by other names such as methyl digitalis, methyldigoxin, and lanitop. These synonyms refer to the same medication, the only difference being the brand name it is sold under and the variation in drug formulation. It is important to note that metildigoxin should only be taken as prescribed by a physician and should not be taken without medical supervision as it can cause serious side effects if not taken properly.