- Mayfield Drug Screening THE RIGHT CARD The Simple Comprehensive Drug Testing System * Standard 5 Panel (NIDA) COC, Meth, Amph, Mor, PCP, THC Clear, easy-to-read results Two lines indicate negative screen One line indicates positive screen Convenient Room temperature storage Individually wrapped Detect multiple drugs simultaneously Built-in Urine Test Strip Confirm sample integrity quickly No ...www.mayfields.com