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Re: what does half-life mean?

Posted by OddipusRex on February 6, 2003, at 11:19:48

In reply to Re: what does half-life mean? » babs, posted by jumpy on February 5, 2003, at 18:03:35

So is the half life of what's left also 7 hours etc. so after 5 half lifes (35 hours) there will be 1/32 of the original concentration? (I liked to read during math class myself)


> > if geodon has a half-life of 7 hours, how long will it take to get out of my system? i was on it for ten days. thanks, babs
>
> Half life is the amount of time it take the body to remove "half" of a substance from the blood stream. In general, multiply the half life times "5" to determine how long it take a drug to clear your system or how long it takes a drug to reach a steady state in the blood stream. So, if the half life is 7 hours .... after about 7*5=35 ... 35 hours the drug will be cleared from the system.
>
> Jumpy
>
> PS Thing get complicated if the drug has an active metabolite with a diferent half life then the parent drug or if the drug is easily stored in fat tissue.
>


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