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Digoxin immune Fab used to treat digoxin toxicity. The primary treatment of digoxin toxicity is digoxin immune fab, which is an antibody made up of anti-digoxin immunoglobulin fragments. This antidote has been shown to be highly effective in treating life-threatening signs of digoxin toxicity such as hyperkalemia, hemodynamic instability, and ...
Digoxin immune fab or digoxin-specific antibody is an antidote for overdose of digoxin. [3] It is made from immunoglobulin fragments from sheep that have already been immunized with a digoxin derivative, digoxindicarboxymethoxylamine (DDMA). Its brand names include Digibind (GlaxoSmithKline) and DigiFab (BTG plc).
In toxicity, the usual supportive measures are provided. If arrhythmias prove troublesome, or malignant hyperkalaemia occurs (inexorably rising potassium level due to paralysis of the cell membrane-bound, ATPase-dependent Na/K pumps), the specific antidote is antidigoxin (antibody fragments against digoxin, trade names Digibind and Digifab). [7]
Digoxin increased the risk of death in women by 23%. There was no difference in the death rate for men in the study. [38] Digoxin is also used as a standard control substance to test for P-glycoprotein inhibition. [39] Digoxin appears to be a peripherally selective drug due to limited brain uptake caused by binding to P-glycoprotein. [40] [41]
Digoxin Immune Fab is the antigen binding fragment of polyclonal antibodies raised to Digitalis derivative as a hapten bound to a protein and is used for the reversal of life-threatening digoxin or digitoxin toxicity. [1] [2] [3] Rho(D) immune globulin is made from pooled human plasma provided by Rh-negative donors with antibodies to the D antigen.
A dose of 400 mg is used in digoxin poisoning, but a dose of 800 mg is recommended for oleandrin poisoning due to the lower binding affinity of the antibody to oleandrin. [ 22 ] [ 23 ] Patients receiving an adequate dose of anti-digoxin Fab show a good response, resolving serious arrhythmias in two hours in fifty percent of the cases.