Which drug tests are best? There are many reasons for a portable drug test. Some businesses require drug tests for employment or following an on-site accident. School sports teams may do a random ...

An immunoassay (IA) test is a type of urine drug test (UDT) that can screen for phencyclidine, which people also call PCP or angel dust. This testing method is quick, easy to use, and cost effective.

A 14-year-old boy presented unresponsive to a children’s hospital after a presumed fentanyl overdose. His urine drug screen was negative in the emergency department, including opiates. While in the ...