> As recent, on-patent drugs, they are very, very expensive ($360/month...
Expensive is always relative to one's income. But, to put that number into perspective relative to another medication given for a good night's sleep:
I'm the parent of a narcoleptic. The meds to get a good night's sleep, Xyrem, are in the $15k / month range. The recently approved generics are 1/2 that.