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Reference.org
Reagent testing
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<p>Reagent testing is one of the processes used to identify substances contained within a pill, usually illicit substances. With the increased prevalence of drugs being available in their pure forms, the terms "drug checking" or "pill testing" may also be used, although these terms usually refer to testing with a wider variety of techniques covered by <a href="/facts/Drug_checking/lFM6GmRD">drug checking</a>. </p>