Problem: A patient presents to the emergency room (ER) intoxicated with an unknown substance. He presents with ataxia and is highly somnolent on mental status examination, with low blood pressure, heart rate, and respiratory rate. Which of the following substances is the toxicology screen most likely to come back positive for? Need Assignment Help? • A. Amphetamines • B. Benzodiazepines • C. Lithium O D. Lysergic acid diethylamide (LSD) O E. Phencyclidine (PCP)