Q. A 29-year-old female who recently gave birth to her first child, a healthy baby boy, six weeks ago, presents to your clinic today with complaints of low mood, decreased interest in her usual activities, and feelings of worthlessness and guilt. She reports difficulty falling and staying asleep, and decreased appetite. She denies any suicidal or homicidal ideations. The patient reports that she has been feeling this way for the past two weeks and that she initially attributed it to the stress of adjusting to life with a newborn. However, she has noticed that her symptoms have not improved and have, in fact, worsened over time. She denies any difficulty with breastfeeding, and reports the infant is latching and feeding well. Upon further questioning, she reports that she has a history of depression, for which she was previously treated with medication and counseling. She also reports a family history of depression. Physical exam is unremarkable, and her vital signs are within normal limits. However, her mental status exam is notable for a sad affect, slowed speech, and decreased motor activity. Her thoughts are negative and self-deprecating, and she reports feeling hopeless about her ability to care for her newborn. Based on her history and clinical presentation, you diagnose her with postpartum depression. Which of the following therapeutic options is LEAST safe for this patient?