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The nurse is preparing to administer warfarin. Which are accurate statements about the safety of warfarin?
a. The prothrombin time (PT) level is used to monitor the medication's effectiveness. Warfarin is safe in pregnancy.
b. When the medication is discontinued, total reversal of medication effects takes 2 hours.
c. There is a black box warning on the prescribing information specific to bleeding risk and warfarin.
d. Warfarin interacts with numerous medications and should be used cautiousl