Definition of "tox"

“How are you going to have a conversation around the patient’s positive tox screen results?” asked Dr. Lidya H. Wlasiuk, who teaches addiction awareness and interventions here at Boston University School of Medicine.

2018 September 10, Jan Hoffman, “Most Doctors Are Ill-Equipped to Deal With the Opioid Epidemic. Few Medical Schools Teach Addiction.”, in The New York Times‎