NEW STEP BY STEP MAP FOR ZOFRAN AND PHENOBARBITAL

5. Phenytoin, sodium valproate, valproic acid: The effect of phenobarbital within the metabolism of phenytoin appears to become variable. Some investigators report an accelerating effect, whilst others report no effect. Because the effect of phenobarbital on the metabolism of phenytoin is not predictable, phenytoin and phenobarbital blood levels ou