A patient with liver failure takes acetaminophen (Tylenol) 650 mg tablets by mouth for severe arthritis pain. How many tablets should the nurse instruct that the patient can safely take in one 24 hour period?
a. 2
b. 3
c. 4
d. 5
ANS: C
Acetaminophen (Tylenol) overdose is the most common cause of ALF. Acetaminophen should not exceed 3000 mg in a 24 hour period. If each tablet contains 650 mg, then divide 3000 mg/650 mg = 4.6 tablets. The patient can safely take 4 tablets of the medication in one day.
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