Acetyldigitoxin

A cardiac glycoside used in the treatment of heart conditions

Acetyldigitoxin
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Acetyldigitoxin is a cardiac glycoside derived from the Digitalis plant, commonly used in the treatment of certain heart conditions. It is a derivative of digitoxin, with an acetyl group added to its structure, which affects its pharmacokinetics and pharmacodynamics.

Chemical Structure

Structural formula of acetyldigitoxin

Acetyldigitoxin is a glycoside composed of a steroid nucleus with a lactone ring and a series of sugar moieties. The acetylation of digitoxin alters its solubility and absorption characteristics.

Pharmacology

Acetyldigitoxin works by inhibiting the sodium-potassium ATPase pump, leading to an increase in intracellular sodium. This increase in sodium promotes calcium influx via the sodium-calcium exchanger, enhancing cardiac contractility. This mechanism is beneficial in conditions such as congestive heart failure and certain types of arrhythmias.

Clinical Use

Acetyldigitoxin is used primarily in the management of heart failure and atrial fibrillation. Its long half-life allows for once-daily dosing, which can improve patient compliance. However, its narrow therapeutic index requires careful monitoring of blood levels to avoid toxicity.

Side Effects

Common side effects of acetyldigitoxin include nausea, vomiting, diarrhea, and confusion. More serious effects can include cardiac arrhythmias, which necessitate regular monitoring of patients on this medication.

Toxicity

Another view of acetyldigitoxin structure

Toxicity from acetyldigitoxin can occur due to its narrow therapeutic window. Symptoms of toxicity include gastrointestinal disturbances, visual changes, and severe arrhythmias. Treatment involves discontinuation of the drug and administration of digoxin-specific antibody fragments in severe cases.

Related pages

• Digitalis
• Cardiac glycoside
• Heart failure
• Atrial fibrillation