What is Hysteresis in PK/PD Analysis?

I apologize to all my readers for such a long lapse between posts. After a very busy summer and fall, I am back to posting regularly to my blog about PK/PD topics. When analyzing PK/PD data, one of the most important plots used to visualize the data is to plot time-matched PK/PD data on a … Continued

Safety and Population Pharmacokinetic Analysis of Intravenous Acetaminophen in Neonates, Infants, Children, and Adolescents with Pain or Fever

The administration of acetaminophen via the oral and rectal routes may be contraindicated in specific clinical settings. Intravenous administration provides an alternative route for fever reduction and analgesia. This phase 1 study of intravenous acetaminophen (Ofirmev, Cadence Pharmaceuticals, Inc., San Diego, CA) in inpatient pediatric patients with pain or fever requiring intravenous therapy was designed … Continued

Risk Assessment of Accidental Nortriptyline Poisoning: The Importance of Cytochrome P450 for Nortriptyline Elimination Investigated Using a Population-based Pharmacokinetic Simulator

It is not possible to make a prospective clinical study that reveals the importance of the nortriptyline metabolising cytochrome P450 (CYP) isoforms (CYP1A2, CYP2C19, CYP2D6, and CYP3A4) in relation to attaining potential toxic nortriptyline concentrations with a possibly fatal outcome. Therefore to study this we have applied the population based pharmacokinetic simulator Simcyp®. The objective … Continued

Certara to Distribute Leading Software for Predicting Off-Target Effects of Small Molecules

Partnership with Chemotargets to support systems drug discovery ST. LOUIS, MO – October 5th, 2011 – Certara™, a leading provider of software and services to improve productivity and decision-making from drug discovery through clinical development, announced that it will be the exclusive provider of Chemotargets software for predicting the off-target pharmacology of small molecules. Chemotargets … Continued

QSAR Models of Cytochrome P450 Enzyme 1A2 Inhibitors Using CoMFA, CoMSIA, and HQSAR

Quantitative structure-activity relationship (QSAR) studies were conducted on an in-house database of cytochrome P450 enzyme 1A2 inhibitors using the comparative molecular field analysis (CoMFA), comparative molecular similarity analysis (CoMSIA) and hologram QSAR (HQSAR) approaches. The database consisted of 36 active molecules featuring varied core structures. The model based on the naphthalene substructure alignment incorporating 19 … Continued