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A physician prescribes5 mg/kgof a drugtwice dailyfor a patient weighing110 lbs. How many0.5 g tabletsof the drug are required for a10-day duration?
Suggested Answer: C
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Comprehensive and Detailed Step-by-Step Explanation:
Explanation of Answer Choices:C. 20Correct.2 tablets per day 10 days = 20 tablets.A. 5 Incorrect. Under-dose.B. 10 Incorrect. Under-dose.D. 40 Incorrect. Over-dose.
Reference:
USP <795> Pharmaceutical Calculations
PTCB Exam: Dosing Conversions
30 comments · newest first
LA
Lashawnda
6 months ago
That means 5000 mg total. Dividing by 500 mg per tablet gives 10 tablets.
LI
Lizbeth
6 months ago
Exactly! Twice a day for 10 days is 20 doses total.
SH
Shanice
6 months ago
So, 5 mg/kg means 250 mg per dose, right?
LA
Layla
6 months ago
Yeah, 110 lbs is about 50 kg.
AZ
Azzie
7 months ago
How did you get that number? I'm confused!
TR
Trinidad
7 months ago
Totally agree, it's definitely 20 tablets!
FA
Fabiola
7 months ago
Wait, are we sure about the conversion?
CO
Coleen
8 months ago
I think that's 20 tablets for 10 days!
CA
Catrice
8 months ago
That's 5 mg/kg for a 110 lb patient, right?
RA
Ranee
8 months ago
Wait, did they say the patient weighs 110 lbs? In that case, the answer must be C) 20 tablets. Easy peasy!
CL
Claribel
8 months ago
Haha, this is like a math word problem straight out of a med school exam! I'll guess D) 40 tablets, just to be safe.
FE
Felix
8 months ago
Hmm, let me think this through. 5 mg/kg twice daily for 10 days... I'll go with D) 40 tablets.
LE
Leonida
8 months ago
I’m leaning towards option C, but I’m not completely confident. I should double-check the total amount needed for the full 10 days.
BE
Bette
9 months ago
If the patient is 110 lbs, that’s about 50 kg, right? So, I guess we multiply 5 mg by 50 kg, then figure out how many tablets that is.
EM
Emmett
9 months ago
I’m a bit unsure about the total dosage over 10 days. I feel like I practiced a similar question, but I can’t recall the exact steps.
DI
Dion
9 months ago
I think I remember that we need to convert the weight from pounds to kilograms first. That might be important for the calculation.
SA
Sabrina
9 months ago
Wait, is the daily dose 5 mg/kg or 5 mg total? I'm not sure if I'm interpreting that correctly. I better double-check my work.
MO
Moira
9 months ago
Okay, I'm feeling pretty confident about this one. Just need to remember the right steps and unit conversions. I think I can nail this question.
NA
Nathalie
9 months ago
Hmm, I think I've got this. We need to convert the weight to kg, then multiply by the dose of 5 mg/kg to get the daily dose. Since it's twice daily, we double that. Then we need to figure out how many 0.5 g tablets that is for 10 days.
SH
Shoshana
10 months ago
I think the answer is C) 20 tablets.
AI
Aileen
10 months ago
This question is tricky! I need to convert the weight first.
DO
Dorsey
10 months ago
The question is a bit tricky, but I'm pretty sure the correct answer is B) 10 tablets.
LE
Lenna
10 months ago
I think the answer is B) 10. Makes sense to me!
CH
Cherilyn
11 months ago
I'm a bit confused on the unit conversions here. Do we need to convert the weight from lbs to kg, or can we just use the lbs directly?
LA
Layla
11 months ago
Okay, let's think this through step-by-step. We need to convert the patient's weight from lbs to kg, then calculate the daily dose, and finally determine how many 0.5 g tablets are needed for 10 days.
LU
Ludivina
5 months ago
Each tablet is 0.5 g, so we need 10 tablets.
JI
Jill
5 months ago
For 10 days, that's 5000 mg total.
JU
Jules
6 months ago
Twice daily means 250 mg times 2. That's 500 mg per day.
NA
Na
6 months ago
Right! Now, we calculate the daily dose. 5 mg/kg for 50 kg is 250 mg.
DA
Davida
10 months ago
First, we convert 110 lbs to kg. That's about 50 kg.