Pharmacokinetics of Oral Terbinafine in Adult Horses

The primary study objective was to compare the pharmacokinetics of p.o. terbinafine alone to p.o. terbinafine administered with p.o. cimetidine in healthy adult horses. The second objective was to assess the pharmacokinetics of terbinafine when administered per rectum in two different suspensions at 30 mg/kg to adult horses. Six healthy adult horses were included in this … Continued

Vaccination Mitigates the Impact of PRRSv Infection on the Pharmacokinetics of Ceftiofur Crystalline-free Acid in Pigs

The pharmacokinetics of intramuscularly administered ceftiofur crystalline-free acid (CCFA) were determined in pigs that were clinically healthy (n = 8), vaccinated with a Porcine reproductive and respiratory syndrome modified live virus (PRRS MLV) (n = 10), challenged with wild-type porcine reproductive and respiratory syndrome virus (PRRSv) VR-2385 (n = 10), or vaccinated with PRRS MLV and later challenged with wild-type PRRSv … Continued

Estimation of Tulathromycin Depletion in Plasma and Milk after Subcutaneous Injection in Lactating Goats Using a Nonlinear Mixed-effects Pharmacokinetic Modeling Approach

BACKGROUND: Extra-label use of tulathromycin in lactating goats is common and may cause violative residues in milk. The objective of this study was to develop a nonlinear mixed-effects pharmacokinetic (NLME-PK) model to estimate tulathromycin depletion in plasma and milk of lactating goats. Eight lactating goats received two subcutaneous injections of 2.5 mg/kg tulathromycin 7 days apart; blood … Continued

How PBTK Models Support Toxicological Triage

Did you know that only a small fraction of the tens of thousands of commercially-used chemicals have undergone toxicological assessment? Time and cost constraints, not to mention the ethical impossibility of studying these chemicals in human trials, hamper large-scale toxicological assessment. Physiologically-based toxicokinetic (PBTK) models can be leveraged to predict TK from in vitro measurements … Continued

Precision Dosing Takes Shape

One size does not fit all, reports Certara’s CEO, Edmundo Muniz, and in situations when pharmacokinetic data may be difficult or impossible to obtain, modeling and simulation will stand alone.

Physiologically-based Pharmacokinetic (PBPK) Modeling Approach for the Prediction of Small Intestinal Precipitation of Poorly Soluble Drugs—A Simulation Study of Posaconazole Using the Simcyp ADAM Model

Weakly basic poorly soluble drug compounds, such as posaconazole (POSA), may dissolve completely at fasted gastric pH but precipitate upon transit to higher small intestinal pH. A number of in vitro and in vivo methods have been used to study intestinal precipitation of poorly soluble drug compounds with a varying degree of complexity. This research … Continued