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DigiFab® Mechanism of Action

DigiFab® Digoxin Immune Fab (Ovine) has an affinity for digoxin in the range of 109 to 1010 M-1, which is greater than the affinity of digoxin for its sodium pump receptor, the presumed receptor for its therapeutic and toxic effects. When administered to a patient, DigiFab® Digoxin Immune Fab (Ovine) binds to molecules of digoxin, reducing free digoxin levels, which results in a shift in the equilibrium away from binding to the receptors, thereby reducing cardio-toxic effects. Fab-digoxin complexes are then cleared by the kidney and reticuloendothelial system.1

Read about efficacy of DigiFab® »

To report an adverse event or for 24-hour medical information, call 1-844-293-0007.

References
  1. DigiFab® [prescribing information]. BTG International Inc. January 2012.

Indication
DigiFab® Digoxin Immune Fab (Ovine) is indicated for the treatment of patients with life-threatening or potentially life-threatening digoxin toxicity or overdose. DigiFab® is not indicated for milder cases of digitalis toxicity.

Important Safety Information
Patients with poor cardiac function may deteriorate secondary to the withdrawal of the inotropic action of digoxin by DigiFab®.  Rapid drop in serum potassium concentration may occur after treatment with DigiFab®. Patients with known allergies to sheep protein, papaya, or papain are at higher risk of an anaphylactic reaction. Suicidal ingestion may involve more than one drug. Toxic effects of other drugs or poisons should not be overlooked. The most common adverse reactions (>7%) related to DigiFab® are worsening congestive heart failure (13%), hypokalemia (13%) and worsening atrial fibrillation (7%). Please see full prescribing information, including events, precautions, or warnings.