ABSTRACT
Of the many stimulants that are used for intoxication,
including methamphetamine, amphetamine, dextroamphe-
tamine, and even methylphenidate, by far the most com-
monly utilized is methamphetamine. All of these stimulants
may be taken orally or, after crushing, intravenously, and
freebase methamphetamine, known as ‘ice’, may be either
smoked or intranasally ‘snorted’. Methamphetamine has a
half-life of 6 12 hours, and urine toxicology may be positive for up to 24 hours. Importantly, urine toxicology may yield
not only false negatives, but also, in the presence of selegiline
or bupropion, false positives.
