Our expert says:
As one gets older your kidneys and liver metabolize drugs slower, and a dose that may have been perfect a few years ago can then be too much. This can be tested with a blood test - the ideal plasma concentration is 4-12 mg/L. Certain medications for instance antibiotics like erythromycin and clarithromycin can increase tegretol levels due to competition for liver enzymes.
Symptoms of a too high tegretol level are being off balance, difficulty walking, slurred speech, abnormal movements, supression of brain function, low blood pressure, slow heartbeat, supressed breathing and blood abnormalities.
Her doctor should monitor her blood levels and see if a reduced level will still cause seizures.
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