This is a report of a symposium on the potential role of epigenetic mechanisms in the control of drug disposition sponsored by the American Society for Pharmacology and Experimental Therapeutics and held at the Experimental Biology 2013 meeting in Boston, MA, April 21, 2013. Epigenetics is a rapidly evolving area, and recent studies have revealed that expression of drug-metabolizing enzymes and...

INTRODUCTION Design differences among pneumatically powered, small-volume nebulizers affect drug disposition (percentage of the dose delivered to the patient, lost to deposition in the equipment, and lost via exhalation to ambient air) and thus affect drug availability and efficacy. OBJECTIVE Evaluate in vitro the dose disposition with 5 nebulizer models, of 3 types (constant-output, breath-e...

The pharmacokinetics and biotransformation of the antiretroviral agent nevirapine (NVP) after autoinduction were characterized in eight healthy male volunteers. Subjects received 200-mg NVP tablets once daily for 2 weeks, followed by 200 mg twice daily for 2 weeks. Then they received a single oral dose (solution) of 50 mg containing 100 microCi of [(14)C]NVP. Biological fluids were analyzed for...

Submit Manuscript | http://medcraveonline.com Abbreviations: AhR: Aryl Hydrocarbon Receptor; Arnt: Nuclear Translocator; CLP: Cecal Ligation and Puncture; CVB3: Coxsackievirus B3; CRP: C-Reactive Protein; CYP-450: Cytochrome P-450; ECOD: Ethoxycoumarin O-Deethylase; GH: Growth Hormone; IMND: Imipramine N-Demethylase; iNOS: inducible Nitric Oxide Synthetase; icv: intracerebroventricularly; IFN-γ...

The absorption and disposition of rizatriptan (MK-0462, Maxalt(TM)), a selective 5-HT(1B/1D) receptor agonist used in the treatment of migraine headaches, was investigated in humans. In a two-period, single i.v. (3 mg, 30-min infusion), and single oral (10 mg) dose study with [(14)C]rizatriptan in six healthy human males, total recovery of radioactivity was approximately 94%, with unchanged riz...

Drug disposition information constitutes a part of systems pharmacokinetics, and becomes imperative when a drug shows significant effects at its disproportionally low blood concentration. The situation could result from outweighing the parent drug in tissues over in blood and/or from its active metabolites. Fractions of certain drugs absorbed from the intestine to the systemic circulation via t...

Over the past 15 years, thanks to the development of clinical pharmacology, pharmacokinetics and more accurate analytical techniques, many of the variables determining the effects of drugs have been better defined and understood. We know today that the effects of most therapeutic agents are related on the one hand to the functional status of the receptors and on the other to the concentration o...

Diffusion is not the main process by which drugs are disposed throughout the body. Translational movements of solutes given by different energy-consuming mechanisms are required in order to dispose them efficiently. Membrane transportation and cardiac output distribution are two effective processes to move the molecules among different body sites. Gastrointestinal-blood cycling constitutes a su...

Copyright: © 2012 Ghose R. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Obesity is a major health problem in the United States and worldwide. About 30% of the population in the US is obese (Body Mass Index ...

Target-mediated drug disposition (TMDD) is the phenomenon in which a drug binds with high affinity to its pharmacological target site (such as a receptor) to such an extent that this affects its pharmacokinetic characteristics.1 The aim of this Tutorial is to provide an introductory guide to the mathematical aspects of TMDD models for pharmaceutical researchers. Examples of Berkeley Madonna2 co...