1. Individualized Treatment Duration: The duration for taking Trioptal suspension (Oxcarbazepine) varies based on seizure control and the neurologist's assessment.

2. Seizure Control: If seizures are well-controlled for a significant period (often 2 years or more), the doctor may consider tapering the medication.

3. Medical Supervision: Any changes to medication should only be done under the guidance of a neurologist to avoid seizure recurrence.

4. Regular Follow-up: Ongoing monitoring through clinical visits and possibly EEGs helps determine the appropriate duration.

Discuss this directly with your daughter's neurologist for a tailored treatment plan.