Final answer:
Olanzapine is often considered the atypical antipsychotic with a higher risk for inducing or exacerbating diabetes mellitus due to its association with weight gain and metabolic changes.
Step-by-step explanation:
Among atypical antipsychotics, clozapine and olanzapine are known to have a higher risk of inducing or exacerbating diabetes mellitus (DM). Olanzapine, in particular, is often associated with significant weight gain and metabolic changes that can worsen or lead to the development of DM. It’s important for patients on these medications to have regular monitoring of blood glucose levels and to receive appropriate lifestyle counseling or adjustments to medication as needed.