The pharmacodynamic components outputs the effect based on
concentration in target tissue. An example of PKPD model of
Midazolam where pharmacokinetic part is modeled using 2-compartment
model and central compartment is connected to sigmoid effect
component.
Cleton, A, R A Voskuyl, and M Danhof (1998-10). “Adaptive
changes in the pharmacodynamics of midazolam in different
experimental models of epilepsy: kindling, cortical stimulation and
genetic absence epilepsy: Epilepsy induced reduction in midazolam
efficacy”. en. In: Br. J. Pharmacol. 125.4,pp. 615–620. ISSN:
0007-1188,1476-5381. DOI: 10.1038/sj.bjp.0702088. URL:
http://dx.doi.org/10.1038/sj.bjp.0702088