Moderate
Established
説明
Carbamazepine reduces topiramate plasma concentrations by approximately 40% through enzyme induction, potentially impairing seizure control.
機序
Carbamazepine induces CYP3A4, which contributes to topiramate metabolism; increased topiramate clearance reduces its plasma levels.
臨床的意義
Seizure breakthrough is a risk when this combination is used; topiramate dose adjustment is typically required.
対処法
Monitor seizure frequency and topiramate levels; consider dose titration upward when carbamazepine is co-prescribed.