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Combining-Topiramate-Valproic acid

447 bytes removed, 10:48, 23 April 2010
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| add = valproic acid
| info =
* Topiramate induces CYP3A4 and is an inhibitor of CYP2C19.
* Valproic acid is principally metabolized by CYP2C9, CYP2C19, CYP2A6 and UDP-glucuronosyltransferases. Valproic acid is an inhibitor of the enzymes CYP2C9, epoxide-hydroxylase and UDP-glucuronosyltransferases.
* {{PossibleSynergisticEffects}}
| start =
* Start valproic acid according to the general dosing advice.
* Pharmacologic response to the drugs should be monitored more closely following addition or withdrawal of one or the other drug. Dose adjustments may be required if an interaction is suspected. {{MonitorChange}}
| cave =
* Topiramate plasma levels are increased by about 15% by valproate, which could be important if valproate is withdrawn. <ref name=”bazire”> Bazire S, Psychotropic Drug Directory 2007, HealthComm UK Limited, Aberdeen, 2007. </ref>
}}
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