HEIA was the term coined by Immunalysis in 2006 to describe its homogeneous enzyme immunoassays intended for the qualitative or semi-quantitative screening of drugs in human urine and oral fluid.

HEIA formats are designed to be rapid and inexpensive, since the assays require no incubation or separation steps, and the reactions occur entirely in solution.

Urine HEIA
Oral Fluid HEIA