Kerfuffle! (pt 1)

Kerfuffle! (pt 1)

A kerfuffle is the polite term for a cascading series of errors that can be initiated by a seemingly innocuous event that then leads to other errors that seem to gain in severity and impact. Kerfuffles can appear in any line of work or play that involves a linked series of tasks with downstream implications. In fact, the modeling and simulation activities performed to support model-based drug development have the potential to produce a catalogue of kerfuffles that can culminate in the failure to deliver modeling and simulation results when they are needed for decision-making. Kerfuffles often have their origins in inadvertent oversights committed early in the study design and data collection process or in the commonplace shortcuts taken to deliver preliminary (“quick-and-dirty”) results for internal use.

Modeling Effects of Exenatide on the Pharmacokinetics of Acetaminophen, Digoxin, and Warfarin

Modeling Effects of Exenatide on the Pharmacokinetics of Acetaminophen, Digoxin, and Warfarin

Conference: AAPS

Exenatide, a 39-amino acid peptide used for treatment of type 2 diabetes, is known to inhibit gastric emptying and as a result to alter the absorption of orally administered concomitant medications.

Structural Requirements for Drug Inhibition of the Liver Specific Human Organic Cation Transport Protein 1

Structural Requirements for Drug Inhibition of the Liver Specific Human Organic Cation Transport Protein 1

Publication: J Med Chem
Software: ADMET Predictor®

The liver-specific organic cation transport protein (OCT1; SLC22A1) transports several cationic drugs including the antidiabetic drug metformin and the anticancer agents oxaliplatin and imatinib.

Physicochemical characterization of five glyburide powders: a BCS based approach to predict oral absorption.

Physicochemical characterization of five glyburide powders: a BCS based approach to predict oral absorption.

Publication: Eur J Pharm Biopharm
Software: GastroPlus®

The purpose of this study was to investigate the suitability of physicochemical parameters of Active Pharmaceutical Ingredients (APIs) as input functions for the Advanced Compartmental Absorption and Transit Model...

Mechanistic Modeling of Metoprolol Absorption and Pharmacokinetics from Immediate and Modified Release Formulations

Mechanistic Modeling of Metoprolol Absorption and Pharmacokinetics from Immediate and Modified Release Formulations

Conference: CRS
Software: GastroPlus®
Division: PBPK

As one of the most widely used b-blocking agents, metoprolol is also a popular drug in research studies. A number of published studies describe the pharmacokinetics as well as the pharmacodynamics of…

Physicochemical properties of the nucleoside prodrug R1626 leading to high oral bioavailability

Physicochemical properties of the nucleoside prodrug R1626 leading to high oral bioavailability

Publication: Drug Dev Ind Pharm
Software: GastroPlus®

The nucleoside analog R1479 is a potent and highly selective inhibitor of NS5b-directed hepatitis C virus (HCV) RNA polymerase in vitro.

Hepatocellular binding of drugs: correction for unbound fraction in hepatocyte incubations using microsomal binding or drug lipophilicity data

Hepatocellular binding of drugs: correction for unbound fraction in hepatocyte incubations using microsomal binding or drug lipophilicity data

Publication: Drug Metab Dispos
Division: PBPK

Analogous to the fraction unbound in microsomes (fumic), fraction unbound in hepatocyte incubations (fuhep) is an important parameter in the prediction of intrinsic clearance and potential drug-drug interactions.