Cross-reactivities of 41 new amphetamine designer drugs to EMIT® immunoassays

Amphetamine designer drugs are central nervous system stimulants, and are widely diffused in illegal markets. Monitoring of drugs of abuse in biological fluids is successfully used for clinical and forensic applications. In particular, the urine matrix allows the verification of drug intake in the short and medium term. In a forensic toxicology laboratory, typical analysis for these drugs involves an immunoassay screening method. Here we describe the cross-reactivity profiles of 41 new amphetamine designer drugs to the urine drug tests EMIT II Plus (Amphetamines assay and Ecstasy assay).