The five-drug urine test used in the Federal Drug-Free Workplace Program does not detect all drugs used. For example, it does not detect so-called “club” drugs such as gamma hydroxybutyrate (GHB) and Ecstasy, for example, although other urine tests can determine use of these drugs, and hair tests can easily detect Ecstasy use.

No standard test, however, can detect inhalant abuse, a problem that can have serious, even fatal, consequences. (Inhalant abuse refers to the deliberate inhalation or sniffing of common household products—gasoline, correction fluid, felt-tip markers, spray paint, air freshener, and cooking spray, to name a few—with the purpose of “getting high.”)