Using PBPK Models to Optimize Anti-HIV Drug Dosing for Pregnant Women

In this webinar, we will discussed how we combined clinical and pre-clinical approaches to develop a PBPK model to predict the exposure of darunavir, a protease inhibitor commonly used to treat pregnant HIV+ patients. Moreover, we elaborated on the study design, data collection, and analyses that were used to investigate the clinical pharmacokinetics of antiretroviral agents during pregnancy.

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Expanding the Use of Pharmacometrics in Japan with Yusuke Tanigawara

Suzanne Minton

Science is a global endeavor. Indeed, one of the most exciting things about drug development is working with scientists doing important research all over the globe. The use of modeling and simulation (M&S) to support drug development has been embraced by pharmaceutical researchers in some parts of the world and is still gaining traction in […]

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Topics: PK/PD Modeling & Simulation

Quantify HBV Clinical Outcomes Database

The Quantify HBV Database is developed to document clinical safety and efficacy information on different nucleosides (eg, entecavir, lamivudine, tenofovir disoproxil fumarate, telbivudine, adefovir and combination) focusing on 3 different endpoints: HBV DNA time course, HBsAG time course, and HBeAG seroconversion that are available in the public domain.

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New Tools Support Developing Better TB Drugs

I. Gardner & O. Hatley

Tuberculosis (TB)—caused by infection with the mycobacterium Mycobacterium tuberculosis—is one of the top 10 leading causes of death worldwide with a total of 1.8 million people dying from the disease in 2015. TB is also the leading cause of death in HIV-infected individuals. TB usually attacks the lungs but can infect any part of the […]

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Topics: PBPK Modeling & Simulation

Certara’s Best of Blogs 2016

A selection of short essays from our blog, written to empower our customers with modeling and simulation (M&S) and regulatory writing solutions in order to help them solve the toughest drug development problems. Certara staff contributions range in topic from pharmacometrics to systems biology to the growing importance of regulatory writing and sharing clinical trial results.

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Best Practices in PBPK: The Case of Efavirenz

Lisa Almond

According to the FDA’s Guidance for Industry on Drug-drug interactions (DDIs), assessment of a new drug’s DDI liability has three major objectives: determining whether any interactions necessitate dosing adjustment, informing the extent of therapeutic monitoring that may be required and identifying any potential contraindications to concomitant use when lesser measures cannot mitigate risk Physiologically-based pharmacokinetic […]

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Topics: PBPK Modeling & Simulation

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 […]

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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 […]

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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 […]

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A Study to Examine the Relationship Between Metritis Severity and Depletion of Oxytetracycline in Plasma and Milk after Intrauterine Infusion

Metritis is a frequent problem in postpartum dairy cows. Intrauterine therapy with the antimicrobial oxytetracycline (OTC) is often used, although this therapy has not been shown to be superior to systemic therapy. The objectives of this study were to (1) determine the plasma and milk concentrations of OTC following intrauterine infusion in postpartum dairy cows […]

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