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How important are receptor affinity numbers?

receptor affinity

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#1 tfor

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Posted 13 December 2014 - 04:14 AM


If for example you've already tried a SSRI and then you think about trying another one with a similar

receptor affinity profile then would this even make sense?

If for example drug A failed and drug B has an even weaker receptor affinity for the same receptors then does this

mean that drug B will also fail? Is it basically all down to numbers?



#2 FW900

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Posted 13 December 2014 - 07:13 AM

A lower Ki value means a stronger binding affinity.



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#3 Flex

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Posted 01 January 2015 - 03:58 AM

Afaik:

You can compensate the lower affinity by increasing the dose.

but not the dissoziation from the receptor like in the case of neuroleptics:

quentiapine can therefore never be the same as haldol







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