elimination half-life stuff

Posted by Elizabeth on April 5, 2002, at 8:52:24

In reply to Re: FACHAD:Thanks, great stuff, one teeny question: » Janelle, posted by fachad on April 4, 2002, at 22:04:53

> I think after 5 half lives have elapsed without any more doses the drug is considered effectively gone.
After 5 half-lives, there's 2^-5 = 1/32 = about 3% of the original amount left. My understanding is that after 7 half-lives the drug is considered to be effectively "gone" (at that point, less than 1% remains).
Of course, this depends on the amount taken in the first place. The elimination half-life also can differ depending on whether you've been taking the drug regularly, or just a single dose.
-elizabeth

Thread

Could someone explain HALF-LIFE w/ example! Janelle 4/4/02
Half-Life: Explained with Examples and Importance » Janelle fachad 4/4/02
FACHAD:Thanks, great stuff, one teeny question: » fachad Janelle 4/4/02
Re: Could someone explain HALF-LIFE w/ example! » Janelle Sunnely 4/4/02
Sunnely: wow, thanks, how do you know this stuff?! (nm) » Sunnely Janelle 4/4/02
FACHAD: I still need YOUR answer to quest above! (nm) Janelle 4/4/02
Re: FACHAD:Thanks, great stuff, one teeny question: » Janelle fachad 4/4/02
RELATIONSHIP BTW 1/2 LIFE AND ONSET OF ACTION? Janelle 4/4/02
FACHAD: 2 questions 4 U (1/2 lives revisited!) Janelle 4/4/02
Relationship btw 1/2 life and onset of action? Janelle 4/5/02
SUNNELLY: could you answer this one also please?! (nm) Janelle 4/5/02
Re: Relationship btw 1/2 life and onset of action? Elizabeth 4/5/02
elimination half-life stuff Elizabeth 4/5/02
How Many Half-Lives Until it's Gone? » Janelle fachad 4/5/02
Re: Relationship btw 1/2 life and onset of action? » Janelle IsoM 4/5/02
ELIZabeth: what does ^- mean? (nm) » Elizabeth Janelle 4/5/02
How can 1/2 life be SAME for DIFF concentrations? Janelle 4/5/02
FACHAD: what does GC/MS stand for? (nm) » fachad Janelle 4/5/02
ELIZABETH: what do AFAIk and HTH stand for?! (nm) » Elizabeth Janelle 4/5/02
FACHAD: you forgot my second question, here it is: » fachad Janelle 4/5/02
What does ^- mean in a computation? Janelle 4/5/02
Re: What does ^- mean in a computation? » Janelle JohnX2 4/5/02
What ^(-5) means » Janelle IsoM 4/5/02
AFAIk/as far as I'm concerned HTH/hope that helps (nm) » Janelle IsoM 4/5/02
GC/MS = Gas Chromatography / Mass Spectrometry » Janelle fachad 4/5/02
...
Re: Adam, I have no idea what you did! what is ''e''? 2sense 4/15/02

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poster:Elizabeth thread:101843
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