Exam NAPLEX Topic 4 Question 153 Discussion

Actual exam question for NABP's NAPLEX exam
Question #: 153
Topic #: 4
LN is 84 YOM who is in hospital for a back surgery. His height is 5 feet and 4 inches, weight 85 kg and NKDA.
His past medical history includes hypertension, diabetes mellitus, major depression, hypothyroidism and chronic back pain. Post-op day 1, LN's medication includes Dexamethasone 8mg iv q6h with taper dosing, Ondansetron 4mg iv q6h prn for N/V, Levothyroxine 0.075mg po daily, Lisinopril 10mg po daily, Citalopram
20mg po daily, Docusate sodium / Senna 1 tab po twice a day, Bisacodyl 10mg suppository daily prn for constipation, Famotidine 20mg iv q12hr, Metoclopramide 10mg iv q6h, Metformin 500mg po bid, D51/2NS with
20K at 125mls/hour and Hydromorphone PCA at 0.2mg/hour of basal rate, demand dose 0.1mg. lock-out every
6min, one hour limit 2.2mg/hour. Pertinent morning labs includes serum creatinine 1.4mg/dl, Mg 1.5mg/dl, K
5.0mmol/L, Na 135mmol/L. The bioavailability of levothyroxine is roughly 50%.
The physician requests you for a dose recommendation to convert her home dose of 75mcg po daily to intravenous.
What would be the appropriate intravenous dose?

Suggested Answer: A Vote an answer

Since the bioavailability of levothyroxine is roughly 50% (given in the question). To convert the home dose to intravenous, it would be 50% of the oral dose. So 50% of oral 75 mcg would be 37.5 mcg intravenously.

by Victoria at Mar 11, 2026, 06:46 AM

Limited Time Offer

15%

Off

Get Premium NAPLEX Questions as Interactive Self Test Engine or PDF

Comments

Chosen Answer:
This is a voting comment (?) , you can switch to a simple comment.
Switch to a voting comment New
Nick name: Submit Cancel
A voting comment increases the vote count for the chosen answer by one.

Upvoting a comment with a selected answer will also increase the vote count towards that answer by one. So if you see a comment that you already agree with, you can upvote it instead of posting a new comment.
0
0
0
10