People with epilepsy routinely undergo operations and procedures that have nothing to do with epilepsy surgery. The main perioperative priorities are usually straightforward: avoid unintended antiseizure-medication interruption, identify relevant drug interactions and plan for fasting, recovery and any previous seizure-related anaesthetic problems.
Epilepsy usually does not prevent anaesthesia
General, regional and local anaesthesia can all be used in people with epilepsy.
The appropriate technique depends on the operation, medical history, medicines and anaesthetic team—not simply on the epilepsy diagnosis.
Medication continuity is one of the biggest practical issues
Missing antiseizure medicines around surgery can increase the risk of breakthrough seizures.
Preoperative plans should state which medicines can be taken with a small amount of water, whether an intravenous or alternative formulation is available and how treatment will resume after surgery.
Fasting instructions and medicine instructions are not identical
Being told to fast does not automatically mean every regular medicine should be omitted.
Patients should follow the specific instructions from the anaesthetic or surgical team rather than stopping antiseizure medication on their own.
Drug interactions matter
Enzyme-inducing antiseizure medicines can alter the metabolism of other drugs. Conversely, perioperative medicines can affect antiseizure drug concentrations, sedation and seizure threshold.
A complete medication list—including rescue medicines and non-prescription products—helps the anaesthetic team plan safely.
Some anaesthetic drugs have pro- and anticonvulsant properties
Many commonly used anaesthetic agents are compatible with epilepsy, and some suppress seizure activity at anaesthetic doses.
Certain agents can produce epileptiform EEG activity or seizure-like movements under particular conditions, which is why perioperative events should be interpreted by clinicians rather than assumed to be epileptic.
Recovery can temporarily alter seizure risk
Sleep loss, pain, nausea, vomiting, metabolic disturbance and delayed medication doses can occur after surgery.
If oral medicines cannot be retained, an alternative plan may be needed.
Ketogenic dietary therapy requires special planning
People using a ketogenic diet for epilepsy may require coordination with anaesthesia, pharmacy and dietetic teams because carbohydrate-containing fluids and prolonged fasting can alter metabolic management.
This is a specialist issue rather than a reason to avoid surgery.
Related reading
Sources and further reading
- Epilepsy and anesthesia — perioperative review
- Perioperative management of patients with seizure disorders: Part II
- Perioperative Medication Management — 2024 review
Evidence checked: September 2026.