Review Question - QID 213658

A 22-year-old man presents to the emergency department with acute agitation. He was brought in by police when he was found breaking into a shop at night. The patient is not willing to participate in the interview and attempts to escape, requiring restraint by multiple security personnel. The patient is aggressive and yelling. He is given haloperidol, diphenhydramine, and lorazepam. He is subsequently examined and is found to be irritable and confused. His pupils are dilated, and his exam is notable for both a horizontal and vertical nystagmus. Mild provocation causes the patient to become agitated again, requiring physical restraints and ketamine. Which of the following was most likely ingested by this patient?