In-vitro model for simultaneous simulation of the serum kinetics of two drugs with different half-lives.

Simultaneous administration of two drugs is frequently practised in clinical chemotherapy because of the synergistic potential of drug combinations. During in-vitro testing of the effect of such drug combinations, differences in the pharmacokinetic properties of the two drugs should be considered. This paper presents the mathematical background and the technical components of an in-vitro model that allows the simultaneous simulation of first order elimination kinetics of two drugs with different half-lives. The model allows simulations of multiple dose regimens of either bolus injections or continuous infusions of each drug.