levels of both drugs were extremely low in brains of controls ( cbz 0.8 +/- 0.02 micrograms/g ; pb 1.49 +/- 0.7 micrograms/g of fresh tissue ) , but higher levels were found in brains of epileptic cats with cbz showing the greater increase ( peak concentrations five- to sixfold higher than the corresponding csf free fraction vs. three- to fourfold higher for pb ) .
C0006104
brains
C0014544
epileptic