Phenylethylmalonamide (PEMA) is an active metabolite of the anticonvulsant drug primidone, although it is produced in a much lower concentration than phenobarbital, the other active metabolite.
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Wikipedia
Phenylethylmalonamide (PEMA) is an active metabolite of the anticonvulsant drug primidone, although it is produced in a much lower concentration than phenobarbital, the other active metabolite.
References