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0. Phenobarbital is a barbiturate and will cause a positive test result for barbiturates. Phenytoin (Dilantin) is not a barbiturate; however a metabolite, p-hydroxyphenytoin has minimal cross reactivity on the initial screening test. There is no interfe.... Phenobarbital is a barbiturate and will cause a positive test result for barbiturates. Phenytoin (Dilantin) is not a barbiturate; however a metabolite, p-hydroxyphenytoin has minimal cross reactivity on the initial screening test. There is no interfe...
Dilantin is the brand name of the drug phenytoin, which is used to treat seizures. The medication is also used to prevent seizures after brain surgery. The drug is in a class of medications known as anticonvulsants. It works by decreasing abnormal electrical activity in the brain.