Q. A 29-year-old G1P0 at 8 weeks gestation presents to the emergency department with a complaint of severe nausea and vomiting that has persisted for the past three days. She reports that she has been unable to keep any food or fluids down and is feeling increasingly weak and lightheaded. She denies any fever, abdominal pain, or diarrhea. On physical examination, the patient is found to be mildly dehydrated, with a heart rate of 110/min and a blood pressure of 100/60 mm Hg. Her abdomen is soft and nontender, with no palpable masses or hepatosplenomegaly. A pelvic examination reveals a closed cervix and no evidence of active bleeding. Given the severity and duration of her symptoms, you make a presumptive diagnosis of hyperemesis gravidarum. You start her on intravenous fluids and electrolyte replacement. Which of the following is NOT considered a first-line initial therapy for this patient’s condition according to the American College of Obstetrics and Gynecology Nausea and Vomiting in Pregnancy guidelines?