A 17-year-old girl who is 6 weeks pregnant presents to the emergency department with abdominal pain and vaginal bleeding. Ultrasound shows no fetal heartbeat and incomplete fetal development, and the pregnancy is terminated by aspiration to remove the fetal tissue. On questioning, the patient reports that she has been taking high doses of her mother’s ulcer medication for her own heartburn. Which of the following medications did this patient most likely take?
(B) Magnesium hydroxide