Interferences and recovery of digitalis glycoside preparations using commercial radioimmunoassay kits for digoxin and digitoxin.

The authors compare and discuss sensitivity and reproducibility of commercial RIA kits of digoxin and digitoxin commonly used in routine hospital laboratories and in emergency. Cross reactivity and recovery of these kits with different digitalis preparations currently prescribed in medical practice are studied with a view to practical application in patients receiving digitalis glycosides and derivatives.