Unit 1, Chapter 1-5 pharmacology quizzes ATI

A provider prescribes phenobarbital for pt. who has seizure disorder. The med. has a long half-life of 4 days. How many times per day should nurse expect to give this med? A) 1 B) 2 C) 3 D) 4 Correct Answer - *Answer: A* Rationale: A) Meds with long half-lives remain at their therapeutic levels between doses for long periods of time. Expect to give phenobarbital once a day. B) A med the nurse gives 2x a day would have a shorter half life. An example is vancomycin. C) 3x a day would have shorter half-life. Example is zidovudine. D) 4x a day would have short half-life. Example is ibuprofen. A staff educator is reviewing medication disages and factors that influence medication metabolism with a group of nurses at an in-service presentation. Which of the following factors should the educator include as a reason to administer lower med dosages? (Select all that apply.) A) Increased renal excretion B) Increased med-metabolizing enzymes C) Liver failure