SANTA ROSA, Calif.--(BUSINESS WIRE)--Redwood Toxicology Laboratory (RTL) expanded its Synthetic Cannabinoid Oral Fluid Drug Test to include four newer-generation, uncontrolled designer drugs. The additions of AM-2201, JWH-210, JWH-081, and RCS-4 address changing drug abuse patterns that resulted from the DEA’s ban of five synthetic cannabinoids.