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{{Drugcombi
| base = Topiramatetopiramate| add = Valproic valproic acid
| info =
* Topiramate induces CYP3A4 and is an inhibiter 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.
* This combination of drugs may have possible synergistic effects. However, the pharmacokinetic drug interactions will influence the plasma levels. Dose adaptation will be recommended for this combination.{{PossibleSynergisticEffects}}
| start =
* Start valproic acid according to the general dosing advice.