A class about marijuana use and testing in the workplace will be held at 9 a.m. Tuesday Nov. 27 at the District 9R building, 201 E. 12th St. in Durango.

Cedar Diagnostics is hosting the course and will discuss testing for marijuana, opioid, other drugs and alcohol.

The cost is $75 per person or a group rate of five or more people for $60 per person. RSVP by Nov. 21 to 565-9515.