Phenobarbital Drug Level Test - Phenobarbital Level Test

The phenobarbital level test is a quantitative measurement of the concentration of phenobarbital, a long-acting barbiturate, in the blood serum. This drug is used as an anticonvulsant (to treat epilepsy) and as a sedative. It has a narrow therapeutic range, as low levels may not control seizures, and high levels can cause severe central nervous system depression. Therefore, regular monitoring of its blood level is crucial.