A male client tells the nurse that he does not want to take the atypical antipsychotic drug olanzapine because of the side effects he experienced when he took the drug for a year. Which experience is most likely related to taking olanzapine?

A. Thoughts of wanting to hurt himself might be associated with various mental health conditions or medications but aren't specifically linked to olanzapine. B. Diarrhea is a less common side effect of olanzapine and is not among the more frequently reported side effects. C. Weight gain is a well-known side effect of olanzapine, with substantial increases reported in some cases. D. Altered liver function tests are less commonly associated with olanzapine use compared to weight gain.