Phenobarbital Conversely is more like a prolonged period anticonvulsant. It is the clonazepam of barbituates, if it will make any perception to state that.Talamh an Éisc Sep 30, 2012 #19 I am aware Individuals who have been prescribed phenobarbital for anxiety, epilepsy (this is usually what phenobarbital is prescribed for in recent times even tho