Interestingly, tthe amphetamines were originally developed as anti-asthma and decongestants, and this continued for many decades. Some of the early amphetamine

Interestingly, tthe amphetamines were originally developed as anti-asthma and decongestants, and this continued for many decades. Some of the early amphetamine abuse epidemics centered around inhalers; you'd crack them open to take the amphetamine powder, or soak them, or otherwise process them after countermeasures were taken. (See _On Speed: The Many Lives of Amphetamine_.) At least one testing lab says salbutamol will cause false positives: http://www.phamatech.com/pdf/01-24-07%20Cross-Reactivity.pdf http://www.phamatech.com/pdf/01-24-07%20Cross-Reactivity.pdf