adiohead
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Registered: 28th Sep 01
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Hi
Is anyone on here able to help with my ignorance.
What is the difference between Dextrothyroxine (D-thyroxine):
and Levothyroxine (L-thyroxine):
I know as much about them as wiki says, but what I want to know is if there is a major difference between the two or will both work in a similar way if given to a patient?
Hope someone knows about this stuff 
[Edited on 23-09-2012 by adiohead]
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adiohead
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Registered: 28th Sep 01
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I found this out:
The prefixes "(+)-", "(–)-", "d-", "l-", "D-", and "L-"
A dextrorotary compound is often prefixed "(+)-" or "d-". Likewise, a levorotary compound is often prefixed "(–)-" or "l-". These "d-" and "l-" prefixes should not be confused with the "D-" and "L-" prefixes based on the actual configuration of each enantiomer, with the version synthesized from naturally occurring (+)-glyceraldehyde being considered the D- form. For example, nine of the nineteen L-amino acids commonly found in proteins are dextrorotatory (at a wavelength of 589 nm), and D-fructose is also referred to as levulose because it is levorotatory
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Colin
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Registered: 4th Apr 02
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Double bonds are in different places!
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adiohead
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Registered: 28th Sep 01
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Yeah that and the H is solid in one and not in the other, but what does it mean? 
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tom130691
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Registered: 13th Sep 08
Location: Daventry
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next the H one cone is solid one isnt 
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LeeM
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Registered: 26th Sep 05
Location: Liverpool
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quote:
Originally posted by tom130691
next the H one cone is solid one isnt
 its not a spot the difference
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adiohead
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Registered: 28th Sep 01
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Bump.
Anyone with medical knowledge?
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Welsh Dan
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Registered: 23rd Mar 00
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Levothyroxine is used for the treatment of under active thyroid glands. I presume D is the opposite. Only based on the fact that I take Levo and have never heard of the other.
[Edited on 24-09-2012 by Welsh Dan]
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John
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Registered: 30th Jun 03
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Presuming D is the opposite because you've never heard of it
http://jcem.endojournals.org/content/49/1/1.short That's a paper on it, can't find it for free though.
From the abstract it would look like they both perform the same function.
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