Active drug use verses passive use evaluation support

Often, a donor/patient will defend or excuse a positive drug test for marijuana as passive exposure. “I didn’t use…I was in a car, or a room, or a closet with someone who did.” While passive exposure may be possible with some drugs like marijuana, often in drug testing it is unlikely given the levels tested and the length of time between exposure and collection of the specimen. Please contact a scientist at the laboratory and we would be happy to evaluate the results with you to determine whether the amount of drug identified may be the result of passive exposure or is absolutely the result of active drug use.