id author title date pages extension mime words sentences flesch summary cache txt cord-322503-fynprt6f Thakur, Aarzoo Physiologically‐Based Pharmacokinetic Modeling to Predict the Clinical Efficacy of the Coadministration of Lopinavir and Ritonavir against SARS‐CoV‐2 2020-08-07 .txt text/plain 3527 210 48 Our aim was to perform pharmacokinetic/pharmacodynamic correlations by comparing simulated free plasma and lung concentration values achieved using different dosing regimens of lopinavir/ritonavir with EC(50,unbound) and EC(90,unbound) values of lopinavir against SARS‐CoV‐2. To address this possibility, we utilized physiologically-based pharmacokinetic (PBPK) modeling to simulate the unbound lung concentration of lopinavir achieved by 400/100 mg twice daily dose of lopinavir/ritonavir in both Caucasians and Chinese populations. 14, 15 Therefore, we derived unbound EC 50 (EC 50,unbound ) values against SARS-CoV-2 from various literature reports and compared it against the predicted C u,lung values to determine if clinically used doses of 400/100 mg twice a day would reach efficacious lung concentrations in Caucasian and Chinese populations. The impact of protein binding on PK/PD assessments were then assessed by comparing the predicted total and unbound lung concentrations of 400/100 mg twice daily lopinavir/ritonavir with EC 50 and EC 50,unbound values of lopinavir against SARS-CoV-2 respectively. ./cache/cord-322503-fynprt6f.txt ./txt/cord-322503-fynprt6f.txt