noun
a barbiturate drug used primarily as an anticonvulsant
adjective
relating to or characteristic of phenobarbital
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Phenobarbital is a medication commonly used to treat seizures in patients with epilepsy.
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My dog takes phenobarbital to control his seizures.
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I heard some people call phenobarbital 'pheno' for short.
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Taking phenobarbital is like putting a blanket over the brain's electrical activity to prevent seizures.