PTCB PTCE Exam - Topic 6 Question 29 Discussion

Actual exam question for PTCB's PTCE exam

Question #: 29
Topic #: 6

[All PTCE Questions]

If a Tadalafil 10mg/tab has a typical half life of 17.5 hours, how long will it take until the blood concentration of this dosage falls to 25% of its initial strength?

A70 Hours

B52.5 Hours

C35 Hours

D17.5 Hours

Show Suggested Answer

Suggested Answer: C

by Meaghan at May 09, 2022, 03:44 PM

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Ivette

4 months ago

Nope, it's definitely 52.5 hours, trust the math!

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Joni

4 months ago

Half-life is 17.5 hours, so 2 half-lives = 35 hours.

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Arlean

4 months ago

Wait, is it really 52.5 hours? Seems longer than I thought.

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Leota

4 months ago

Totally agree, that’s two half-lives!

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Stephane

4 months ago

It takes about 52.5 hours to reach 25% concentration.

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Belen

5 months ago

I feel like I might be overthinking this. I thought it was just one half-life for 50%, but now I’m confused about how to get to 25%.

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Alishia

5 months ago

If the half-life is 17.5 hours, wouldn't it take about 3.5 half-lives to reach 25%? That sounds like 61.25 hours, but I’m not confident in my math.

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Isidra

5 months ago

I remember practicing a similar question where we had to find the time for a drug to reach half its concentration. It was straightforward, so I hope this one is too.

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Refugia

5 months ago

I think the half-life concept is crucial here, but I'm not entirely sure how to calculate the time for it to reach 25%.

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Corrinne

5 months ago

Hmm, I'm a bit confused about the difference between a simple and a composite relationship class. I'll need to review those concepts before deciding on the best approach here.

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Vincent

5 months ago

Alright, I've got this. The NDMP Feature is definitely required, and I believe the Virtual Tape Library Unlimited Drive Option Feature is also needed to share the tape drive. Time to mark that down.

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Gussie

5 months ago

I'm pretty confident on this one. The correct answer is option C - the security policy rule should match the original pre-NAT source and destination addresses, and the pre-NAT destination zone.

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Ollie

5 months ago

I remember discussing negative reinforcement in class, but that doesn't sound right here since they're not removing anything the kid wants.

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