Huestis' research program had sought to discover mechanisms of action of cannabinoid agonists and antagonists, effects of in utero drug exposure, and the neurobiology and pharmacokinetics of novel psychoactive substances, the emerging face of drug abuse.[1] She studied a wide range of illicit drugs, including cocaine, methamphetamine, ecstasy, and heroin.[2] Her research included an initiative to develop new diagnostic tests for designer drugs, which current drug tests cannot detect.