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Of drug metabolism

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  • In a certain sense, the field of drug metabolism (DM) is standing still. More specifically, the basic experiment of drug metabolism (i.e., administering a new drug to an animal or human and determining the structures, amounts, and disposition of the metabolites) has changed very little over a period of decades. Remarkably, the experimental design and resulting data set from a typical absorption, distribution, metabolism, and excretion (ADME) study conducted today would be instantly recognized and understood by DM scientists from 50 years ago.

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  • The Cytochrome P450 is the major enzyme involved in drug metabolism. CYP enzymes are responsible for the metabolism of most clinically used drugs. Individual variability in CYP activity is one important factor that contributes to drug therapy failure.

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  • Pancreatic adenosquamous carcinoma has a poor prognosis, with limited prospective trial data to guide optimal treatment. The potential impact of drug metabolism on the treatment response of patients with pancreatic adenosquamous carcinoma is largely unknown.

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  • Five years have passed since the first edition of Principles of Clinical Pharmacology was published. The second edition remains focused on the principles underlying the clinical use and contemporary development of pharmaceuticals. However, recent advances in the areas of pharmacogenetics, membrane transport, and biotechnology and in our understanding of the pathways of drug metabolism, mechanisms of enzyme induction, and adverse drug reactions have warranted the preparation of this new edition.

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  • Pharmacokinetics (t1/2) and the apparent volume of distribution Vapp (p. 28) by the equation: Vapp t1/2 = In 2 x –––– Cltot The smaller the volume of distribution or the larger the total clearance, the shorter is the half-life. In the case of drugs renally eliminated in unchanged form, the half-life of elimination can be calculated from the cumulative excretion in urine; the final total amount eliminated corresponds to the amount absorbed.

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  • (bq) part 1 book "essentials of pharmaceutical chemistry" has contents: chemistry of acids and bases, partition coefficient and biopharmacy, partition coefficient and biopharmacy, stereochemistry, drug metabolism.

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  • Adjusting Drug Dosages While elimination half-life determines the time required to achieve steadystate plasma concentrations (Css), the magnitude of that steady state is determined by clearance (Cl) and dose alone.

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  • Pharmacokinetic drug–drug interactions (in particular at metabolism) may result in fatal adverse effects in some cases. This basic information, therefore, is needed for drug therapy even in veterinary medicine, as multidrug therapy is not rare in canines and felines. The aim of this review was focused on possible drug–drug interactions in dogs and cats. The interaction includes enzyme induction by phenobarbital, enzyme inhibition by ketoconazole and flu- oroquinolones, and down-regulation of enzymes by dexamethasone.

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  • Recent studies indicate that inflammation may also affect CYP3A4 activity. Associations of CYP3A4- mediated metabolism of quinine, with inflammatory biomarkers were investigated in patients undergoing maintenance hemodialysis (HD).

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  • Experimental approaches for determining the metabolic properties of the drug candidates are usually expensive, time-consuming and labor intensive. There is a great deal of interest in developing computational methods to accurately and efficiently predict the metabolic decomposition of drug-like molecules, which can provide decisive support and guidance for experimentalist.

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  • The sixth edition of Modern Pharmacology With Clinical Applications continues our commitment to enlisting experts in pharmacology to provide a textbook that is up-to-date and comprehensive. Designed to be used during a single semester, the book focuses on the clinical application of drugs within a context of the major principles of pharmacology. It is meant to serve students in medicine, osteopathy, dentistry, pharmacy, and advanced nursing, as well as undergraduate students.

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  • Recent advances in mass spectrometry have rendered it an attractive and versatile tool in industrial and academic research laboratories. As a part of this rapid growth, a considerable body of literature has been devoted to the application of mass spectrometry in clinical studies. In concert with separation techniques such as liquid chromatography, mass spectrometry allows the rapid characterization and quantitative determination of a large array of molecules in complex mixtures.

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  • Antibacterial Drugs can be classified according to their respective primary mode of action (color tone in 2 and 3). When bacterial growth remains unaffected by an antibacterial drug, bacterial resistance is present. This may occur because of certain metabolic characteristics that confer a natural insensitivity to the drug on a particular strain of bacteria (natural resistance). Depending on whether a drug affects only a few or numerous types of bacteria, the terms narrow-spectrum (e.g., penicillin G) or broad-spectrum (e.g., tetracyclines) antibiotic are applied.

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  • Principles of Pharmacokinetics The processes of absorption, distribution, metabolism, and excretion— collectively termed drug disposition—determine the concentration of drug delivered to target effector molecules. Absorption Bioavailability When a drug is administered orally, subcutaneously, intramuscularly, rectally, sublingually, or directly into desired sites of action, the amount of drug actually entering the systemic circulation may be less than with the intravenous route (Fig. 5-2A ).

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  • (BQ) Part 1 of the document Textbook of organic medicinal and pharmaceutical chemistry presents the following contents: Drug design strategies, metabolic changes of drugs and related organic compounds, biotechnology and drug discovery, immunobiologicals, anti infective agents, antibacterial antibiotics, antiviral agents,...

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  • (bq) part 1 book "medical pharmacology at a glance" presents the following contents: principles of drug action, drug absorption, distribution and excretion, drug metabolism, local anaesthetics, autonomic nervous system, autonomic drugs acting at cholinergic synapses, drugs acting on the sympathetic system, ocular pharmacology,... and other contents.

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Molecular and macromolecular alterations of recombinant adenoviral vectors do not resolve changes in hepatic drug metabolism during infection

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  • Many of my friends have been anxious ever since Osteopathy became an established fact, that I should write a treatise on the science. But I was never convinced that the time was ripe for such a production, nor am I even now convinced that this is not a little premature. Osteopathy is only in its infancy, it is a great unknown sea just discovered, and as yet we are only acquainted with its shore-tide. When I saw others who had not more than skimmed the surface of the science, taking up the pen to write books on Osteopathy, and after having carefully examined their productions,...

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  • Constitutively expressed human cytochrome P450 2D6 (CYP2D6; EC 1.14.14.1) is responsible for the metabolism of approximately 25% of drugs in common clinical use. It is widely accepted that CYP2D6 is localized in the endoplasmic reticulum of cells; however, we have identified this enzyme in the mitochondria of human liver samples and found that extensive inter-individual variability exists with respect to the level of the mitochondrial enzyme.

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  • Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Critical Care giúp cho các bạn có thêm kiến thức về ngành y học đề tài: Drug metabolizing enzyme activities versus genetic variances for drug of clinical pharmacogenomic relevance...

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