A Client Was Prescribed Olanzapine (Zyprexa)four Weeks Ago to Treat

A client was prescribed olanzapine (Zyprexa) four weeks ago to treat symptoms of schizophrenia.The client's family has noted only a small improvement in symptoms and asks about changing to another treatment.Which response by the nurse is the most appropriate?

A) "The client will need to see a psychotherapist in conjunction with the medication for there to be a major improvement in symptoms."
B) "It might take 6-8 weeks to see definite improvement in most symptoms."
C) "It might take 8-12 weeks to begin seeing improvement on this therapy."
D) "There should have been improvement within 1-2 weeks."