A 28-year-old woman is brought to the clinic by her sister, who is concerned about her recent reckless behavior. The patient has been spending money excessively, acting sexually promiscuous, speaking delusionally,

A 28-year-old woman is brought to the clinic by her sister, who is concerned about her recent reckless behavior. The patient has been spending money excessively, acting sexually promiscuous, speaking delusionally, and has not slept for three days. The patient is visibly irritated by her sister’s comments. The patient reports periods of depression in the past, which were untreated, but now feels “absolutely great.” She is extremely talkative, easily distracted in her thought process, and reports several different grand new ideas, which she explains within the space of a ten-minute discussion. What is the most likely diagnosis? Acute stress disorder Bipolar disorder Borderline personality disorder Dysthymic disorder