Clobazam serum level

2 questions, if anyone can help me with more info on any of this, and thank you in advance!

1. I know what the therapeutical level numbers for serum clobazam are officially, but what level is most people’s serum clobazam at?
2. Anyone have non-epileptic drop attacks as a clobazam side effect - upon increase of dosage? Like not drowsy all the time but having sudden loss of tone and collapses.