A 26-year-old woman presents with suicidal ideation. She exhibits a depressed mood and has had a lack of pleasure in activities, insomnia, guilt, weight loss, and poor concentration. She has attempted suicide in the past and continues to consider self-harm. Three months ago, she had an episode of increased energy, grandiosity, promiscuity, flight of ideas, and increased talkativeness, none of which severely impaired her social or occupational functioning. Of the following, which is most likely to reduce the likelihood of suicidal behavior in this patient? Carbamazepine Fluoxetine Lithium Quetiapine