A client has received digoxin 0.25 mg po daily for 2 weeks.
Which of the following digoxin levels indicates toxicity?
A . 0.5 ng/mL
B . 1.0 ng/mL
C . 2.0 ng/mL
D . 3.0 ng/mL
(A) 0.5 ng/mL of digoxin is a subtherapeutic level, not a toxic one.
(B) 1.0 ng/mL is a therapeutic level.
(C) 2.0 ng/mL is a therapeutic level.
(D) Digoxin’s therapeutic level is 0.8C2.0 ng/mL. Digoxin’s toxic level is >2.0 ng/mL.