Enzyme immunoassay (EIA) is a biochemical methodology that detects the presence of multiple drugs and/or drug metabolites. By utilizing cloned analyte-specific enzyme donors, EIA offers consistent reproducibility of results. The outcomes are therefore more accurate and dependable.

Liquid Chromatography Mass Spectrometry (LC-MS) is a method or technique used commonly for drug analysis, food analysis, and environmental testing. The advantage of LC-MS analysis is that it enables both high throughput and high sensitivity analysis of analytes.