Drug Testing Laboratory & On-site Drug Screening Devices

At Redwood Toxicology Laboratory, Inc. (RTL), one of the nation's premier forensic drug testing facilities, we offer you comprehensive, low cost drug and alcohol testing options. We deliver the certainty of science, the dependability of proven drug screening processes and the assurance of legally defensible results. Our laboratory services include urine drug testing, oral fluid drug testing, steroid testing and more.

 
RTL also sells millions of instant urine and oral fluid drugs of abuse screening devices each year. With our Reditest^® on-site drug test products, you get more than the highest quality, most cost-effective devices in the industry; you get reliable results. For home use, we now offer the Reditest home drug test and Reditest alcohol breath test.

 
We provide “confidence in drug testing.” Choose RTL for all of your drug testing needs.

 
To learn more about RTL drug tests call today!