Digoxin, a cardiac glycoside similar to digitoxin, is used to treat congestive heart failure and supraventricular arrhythmias due to reentry mechanisms, and to control ventricular rate in the treatment of chronic atrial fibrillation. Digoxin inhibits the Na-K-ATPase membrane pump, resulting in an increase in intracellular sodium. The sodium calcium exchanger (NCX) in turn tries to extrude the sodium and in so doing, pumps in more calcium. Increased intracellular concentrations of calcium may promote activation of contractile proteins (e.g., actin, myosin). Digoxin also acts on the electrical activity of the heart, increasing the slope of phase 4 depolarization, shortening the action potential duration, and decreasing the maximal diastolic potential.

Digoxigenin is a 390.5 Da steroid expressed in heart, kidney, liver, adrenal gland, cerebral cortex, lung and placental tissues; Antibodies to Digoxigenin can be used to study tumor development. Bispecific antibodies (bsAbs) that bind to both tumor specific antigens on the cell surface and to haptens such as digoxigenin (Dig) can direct digoxigeninylated payloads to tumor cells. Digoxigenin is widely used as a method for generating non-radioactive probes, and is an alternative to biotinylation.

Digoxin is a cardiac glycoside derived from the purple foxglove flower. In 1785, the English chemist, botanist, and physician Sir William Withering published his findings that Digitalis purpurea could be used to treat cardiac dropsy (congestive heart failure; CHF). Digoxin has been in use for many years, but was not approved by the FDA for treatment of heart failure (HF) until the late 1990s. Another FDA indication for digoxin is atrial fibrillation (AF). Digoxin also has numerous off-label uses, such as in fetal tachycardia, supra-ventricular tachycardia, cor pulmonale, and pulmonary hypertension. Digitoxin inhibits the Na-K-ATPase membrane pump, resulting in an increase in intracellular sodium and calcium concentrations. Increased intracellular concentrations of calcium may promote activation of contractile proteins (e.g., actin, myosin). Digoxin also has Para sympathomimetic properties. By increasing vagal tone in the sinoatrial and atrioventricular (AV) nodes, it slows the heart rate and AV nodal conduction.

Lanatoside C (or isolanid) is a cardiac glycoside, a type of drug that can be used in the treatment of heart disease. Digitalis lanata is a significant medicinal plant as a source of this compound. Lanatoside C is marketed in a number of countries and it’s also available in generic form. It can be transformed into digoxin by deglucolysation.

Beta-methyl digoxin (beta-methyl digoxin; Metildigoxin (INN, or medigoxin BAN, or methyldigoxin) is a methyl derivative (methyl group in position 4 of the digitoxose residue) of digoxin is a cardiac glycoside, a type of drug that can be used in the treatment of congestive heart failure and cardiac arrhythmia (irregular heartbeat). The substance is closely related to digoxin; it differs from the latter only by an O-methyl group on the terminal monosaccharide.

Acetyldigoxin, a cardiac glycoside that has been studied in patients with congestive heart failure.

Beta-acetyldigoxin (under the brand name Novodigal), a beta-acetyl derivative of digoxin, acts as a prodrug. It is deacetylated in the cells of the intestinal mucosa and is present inside the body solely in the form of digoxin. β-acetyldigoxin has a higher bioavailability than digoxin. Beta-acetyldigoxin is a substrate of P-glycoprotein.