Table 3. Diffusion parameters in Caco-2 cells monolayers.

Parameter*	Units	Stavudine	Lamivudine	Zidovudine
Papp x10-6	cm/s	6.4 ± 1.8	7.0 ± 2.0	20.3 ± 4.7
Flujo (J)	µg/cm2/min	0.081 ± 0.003	0.041 ± 0.005	0.063 ± 0.004

*Mean ± SD (n= 10)

Papp= Apparent permeability coefficient