There is a psychiatric night time tablet for schizophrenia that starts with 'c', does it cause drowsiness?

As above: All psychiatric medication can cause side effect , and those that r given at bedtime can cause sedation and draws ness.

Clozaril (clozapine)? Yes...: If you are talking about clozaril/clozapine, then yes, it can cause drowsiness.

Clozaril (clozapine): Yes, it can cause significant drowsiness at the beginning of treatment.

Either,,,: Clozapine or Chlorpromazine and both have a risk of sedation amongst other side effects.