What is "methylphenobarbital"

n. A barbiturate drug used as a sedative, anxiolytic, and anticonvulsant.

Methylphenobarbital ( INN), also known as mephobarbital ( USAN, JAN) and mephobarbitone ( BAN), marketed under brand names such as Mebaral, Mephyltaletten, Phemiton, and Prominal, is a drug which is a barbiturate derivative and is used primarily as an anticonvulsant, but also as a sedative and anxiolytic. It is the N-methylated analogue of phenobarbital and has similar indications, therapeutic value, and tolerability.