SEROXAT AND OTHER SSRIs

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Clinical Pharmacology of SSRI’s

Posted by shutah on January 16, 2011

Whilst a technical piece of information, this document highlights the differences between the various  SSRIs .

“The half-life of paroxetine is a function of its plasma drug level. Following a single 20 mg dose, paroxetine has a half-life of 10 hours (Table 6.4). Paroxetine does not reach a half-life of 20 hours until steady-state has been reached on 20 mg/day (Table 6.4) because paroxetine inhibits CYP 2D6, which is the CYP enzyme responsible for its biotransformation. When paroxetine levels fall after this drug is discontinued, its clearance rate increases as the inhibition of the enzyme is decreased. Thus, paroxetine and fluvoxamine are more quickly cleared from the body than the other SSRIs. “

 

 

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