A patient who takes warfarin (Coumadin) and digoxin (Lanoxin) develops hypothyroidism and will begin taking levothyroxine (Synthroid). The nurse anticipates which potential adjustments in dosing for this patient?

Question

Quizplus · Accepted Answer

Levothyroxine can increase the effects of digoxin, so a decrease in the dose of digoxin may be necessary. Levothyroxine can also decrease the effect of warfarin, which may require an increase in the dose of warfarin or more frequent monitoring of INR levels. Therefore, increased digoxin and decreased warfarin (choice C) is the most appropriate option.

A Patient Who Takes Warfarin (Coumadin) and Digoxin (Lanoxin) Develops