the ratio free fraction and saliva/serous blood has given for phenobarbital 0.65 ( 0.52 - 0.83 ) and 0.30 ( 0.21 - 0.46 ) , ph 5.9 - 7.5 , phenytoin 0.11 ( 0.10 - 0.11 ) and 0.12 ( 0.08 - 0.23 ) , primidone 0.81 ( 0.74 - 0.83 ) and 1.03 ( 0.88 - 1.11 ) , carbamazepine 0.22 ( 0.20 - 0.26 ) and 0.37 ( 0.30 - 0.50 ) , ethosuximide 0.99 ( 0.81 - 7.01 ) and 0.95 ( 0.90 - 1.30 ) , and less than 0.10 for valproate levels .
C0031412
phenobarbital
C0033148
primidone