Hello,
The normal reference ranges for lamotrigine are 2 – 20 ug/mL during chronic therapy. Detecting drug levels in the blood help in proper seizure control and reduction of side effects of the drug. It helps us in identifying whether the drug is in a therapeutic range or not. The decision of dosage adjustments depends on the doctor’s discretion and varies person to person. Do write to us again with more information.
Take care and good luck!