Abstract: A method and system for use in treating a patient receiving an anticoagulant or a substance containing warfarin to optimize therapy and prevent an adverse drug response. This system employs surrogate markers or indicators including blood levels of the anticoagulant to determine the next required dose for a patient. Since the surrogate markers are employed as a percent change in status, virtually any indicator can be used. Surrogate markers could include any measure of the effectiveness of the anticoagulant's action. Given the effectiveness of the anticoagulant's action relative to the surrogate markers, a change in anticoagulant dose is calculated by the system. Conversely, by employing this system, one could determine the expected result of the anticoagulant dose change on the surrogate markers.

Abstract: An improved method and apparatus using a newly defined nonlinear technology that more accurately describes the biological process of dose titration to calculate next agent dose(s) in single and multi-agent therapy. The overall proportion of each agent is determined by the amount of agent as it relates to the dosing range. The overall proportion as well as the intrinsic potency of the agent is used to determine the total proportional effect that each agent has on the surrogate marker. This parameter is then inserted into the four-parameter equation for calculating dose by adjusting the proportional change in marker that is attributed to the activity of the agent.