It is common for severe symptoms to return if olanzapine is stopped abruptly. While long-term use can safely manage these symptoms, it requires regular monitoring for metabolic side effects like weight gain, elevated blood sugar, cholesterol, and involuntary movements. Since she has been stable on this for over 20 years, any changes must be carefully supervised by her psychiatrist.\n\nIf alternatives are needed, other atypical antipsychotics like aripiprazole, risperidone, or quetiapine may be considered, as they carry different side-effect profiles. Please consult her doctor to discuss a safe, gradual monitoring or transition plan, and never stop her medication suddenly.