AKT-4190

AKT-4190

A 28-year-old woman develops rapid, pressured speech and insomnia for five consecutive nights. She says her energy levels are normal. She has had systemic lupus erythematosus for five years. For two weeks, she has been taking a large daily dose of prednisolone because of a flare-up of this condition. She has no previous personal or family history of psychiatric illness or cardiovascular disease, and she denies using illicit drugs or alcohol.
Which of the following is the most likely cause of this patient’s symptoms?