A 29-year-old woman reports alternating episodes of elevated…
A 29-year-old woman reports alternating episodes of elevated and depressed mood over the past year. She describes episodes in the last 12 months where she felt euphoric, talked rapidly, needed only 3–4 hours of sleep, and spent impulsively. Each of these periods lasted about 5 days and were followed by episodes of low mood, anhedonia, hypersomnia, and feelings of worthlessness lasting 2 to 3 weeks. She denies hallucinations, delusions, or history of full manic episodes. She is currently not on treatment. What is the most appropriate diagnosis?