Table 1. % Reactivity and IC₅₀ values of heroin antibodies with different antigens, viz. heroin, MAM, morphine and codeine, as determined by absorbance and chemiluminescence based immunoassays .

Drug Name	IC 50 (ng/ mL)		Reactivity (%)
	CIA	ELISA	CIA	ELISA
Heroin	0.080	0.35	100	100
MAM	0.095	0.40	132	119
Morphine	0.090	0.30	140	108
Codeine	0.075	0.21	112	98