• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
AK_NEDMDG_2010_Final - New England Drug Metabolism
AK_NEDMDG_2010_Final - New England Drug Metabolism

... Approaches to assess the metabolism of a compound  There are two approaches to assess the metabolism of a compound: in vitro and in vivo. Which of these techniques is used depends on a variety of factors such as the nature of the program, the mindset of the company involved, and the resources avai ...
3-1General Properties of Drugs
3-1General Properties of Drugs

... Drugs do not perform any new functions on a tissue or organ in the body; they only modify existing functions. Drugs in general exert multiple actions rather than a single effect. Drug action results from a physiochemical interaction between the drug and a molecule in the body. ...
Added Technical Terms and Suggested Replacements
Added Technical Terms and Suggested Replacements

... participants in language that they can understand, to help ensure that they have a good idea of what they will experience if they choose to participate in a study. Consent documents should be written so that someone with an eighth grade reading level can understand the information. This list of sugg ...
Take Meds Faithfully - Consumer Reports Health
Take Meds Faithfully - Consumer Reports Health

... patients think they know better than I do what’s good for them.” Non-compliance is also substantially due to the fact that many chronic conditions have no or few symptoms. In such cases, taking a pill everyday that may have side effects can actually seem like an irrational thing to do. The two most ...
Drugs and the Brain
Drugs and the Brain

... compulsive drug seeking and use, despite harmful consequences to the individual and to those around him/her Although the initial decision to take drugs is voluntary, the brain changes that occur over time challenge an addicted person’s self control and impede his/her ability to resist impulses to ta ...
PHYS
PHYS

... recently while entering a house where the suspect was trying to destroy a large amount of heroin/fentanyl in the toilet. This has prompted drug units to carry nasal naloxone as this is not an isolated problem. Fentanyl is bad enough, but some agencies are experiencing carfentanil, the elephant tranq ...
Regulation of Bioavailability and Bioequivalence Studies(2015-03-06)
Regulation of Bioavailability and Bioequivalence Studies(2015-03-06)

... should be compared, including those of onset, end point and suspense, etc. The AUC described in item (1) and (2) of the preceding Subparagraph 1 should include AUC from time zero to infinity (AUC0-∞), and AUC from time zero to the final blood sampling point (AUC0-t, t: final blood sampling point, wh ...
2nd Lecture 1433
2nd Lecture 1433

...  It must be selective in choosing ligands/drugs to bind  To avoid constant activation of the receptor by promiscuous binding of many different ligands  It must change its function upon binding in such a way that the function of the biologic system (cell, tissue, etc) is altered  This is necessar ...
Concerns of Addiction to Anaesthesiologists in the Perioperative
Concerns of Addiction to Anaesthesiologists in the Perioperative

... cause an exaggerated response and lead to delayed recovery from anesthesia or prolonged respiratory depression requiring post-operative ventilatory support. At the same time, inadequate analgesic dosing can re-activate addiction in abstinent patients. Remifentanil infusion can be beneficial in view ...
UNDERSTANDING DRUG ALLERGIES: An Oxymoron?
UNDERSTANDING DRUG ALLERGIES: An Oxymoron?

... ago. The patient did well during induction, but within minutes after receiving a “test” dose of cefazolin he developed urticaria and marked hypotension that required an epinephrine infusion. The pt’s BP stabilized and the pt recovered w/o sequelae. ...
DESIGN AND EVALUATION OF CONTROLLED RELEASE TABLETS OF LIPID LOWERING
DESIGN AND EVALUATION OF CONTROLLED RELEASE TABLETS OF LIPID LOWERING

... formulations are designed to slowly release the active ingredient from the tablet, which allows a reduction in dosing frequency as compared to the typical dosing frequency associated with conventional or immediate dosage forms. The controlled drug release reduces and prolongs blood levels of the dru ...
The Practical Nurses Role in Preventing Medication Errors
The Practical Nurses Role in Preventing Medication Errors

... for obtaining drug information on the job. Nursing drug handbooks: contain drug information along with nursing considerations. Physician's Desk Reference (PDR) Contains manufacturer's descriptions (package inserts) which are written using FDA standards, but may be slanted in favor of the drug being ...
Hypoglycemic Drug Interactions
Hypoglycemic Drug Interactions

... work warrants or represents that the information contained herein is accurate or complete, and they are not responsible for any errors or omissions or for the result obtained from the use of such information. Any use of the newsletter will imply acknowledgment of this disclaimer and release any resp ...
INITIAL INVESTIGATIONAL NEW DRUG APPLICATION
INITIAL INVESTIGATIONAL NEW DRUG APPLICATION

... is allowed.) than protocols for Phase 2 or 3 studies since these protocols should be adaptable as information is obtained. The main concern for phase 1 study protocol is safety. Phase 1 protocols should provide the following information: An estimate of the number of subjects; a description of safety ...
Erlotinib film-coated tablets 25, 100 and 150 mg - EMA
Erlotinib film-coated tablets 25, 100 and 150 mg - EMA

... cross-over ...
v. designs of exposure
v. designs of exposure

... therefore providing an ability to weigh the benefits and risks when choosing doses. The dose-response study can help ensure that excessive doses (beyond those that add to efficacy) are not used, offering some protection against unexpected and unrecognized dose-related toxicity. Captopril, for exampl ...
Extemporaneous formulations-problems and solutions
Extemporaneous formulations-problems and solutions

... is poorly soluble in water, and buffer systems to provide the optimum pH for drug stability or activity of the antimicrobial preservative. Whilst ostensibly simple, such formulations can be complex comprising a mixture of the base and a suspension or solution (usually a combination of both) of table ...
Concentration-Effect Relationship of l
Concentration-Effect Relationship of l

... received less than 3 ml during the total 8.5-hr infusion. Effect measurements and blood sampling. Mean arterial blood pressure was measured by a pressure transducer (Statham P23 DC, Grass Instruments Co., Quincy, MA). Heart rate was captured from the pressure signal, which triggered a tachograph (7P ...
Enough of Clinical…Let’s talk Pre-Clinical!
Enough of Clinical…Let’s talk Pre-Clinical!

... activity, circulatory system, or other considerations make certain models more appropriate based on the dosage form, site of activity, or noxious metabolites. For example, canines may not be good models for solid oral dosage forms because the characteristic carnivore intestine is underdeveloped comp ...
SILT Regimen - Cancer Care Ontario
SILT Regimen - Cancer Care Ontario

... Siltuximab is not recommended for use in pregnancy unless the benefit clearly outweighs the risk. Adequate contraception should be used by both sexes during treatment, and for at least 3 months after the last dose. As siltuximab can cross the placenta, exposed infants may be at increased risk of inf ...
principles of pharmacology
principles of pharmacology

... the interaction of chemical substances with living cells, tissues, and organisms. It is particularly concerned with the mechanisms by which drugs counteract the manifestations of disease and affect fertility. Pharmacology is not primarily focused on the methods of synthesis or isolation of drugs, or ...
Formulation Development Services
Formulation Development Services

... Preclinical formulations, especially those used for oral dosing, are often formulated using high concentrations of test article. As a result, the physical characteristics of the formulation may not be readily predictable. It is important to assess the stability, ease of preparation, suitability and ...
Antiamoebic Drugs
Antiamoebic Drugs

... • 3. Trichomoniasis: It may be effective against some of these resistant organisms • Adverse effects: toxicity profile is better than metronidazole. ...
QA168_7Renal replacement therapiesOct15 final
QA168_7Renal replacement therapiesOct15 final

... drug dosing recommendations used today were performed in the 1980s and 1990s using RRT techniques such as CAVHF. This achieves a lower drug clearance than current methods of continuous RRT which use higher flow rates and more efficient filters (6,18). These studies varied in design, using different ...
Effects of Drugs on the Developing Brain
Effects of Drugs on the Developing Brain

< 1 ... 440 441 442 443 444 445 446 447 448 ... 584 >

Pharmacokinetics



Pharmacokinetics, sometimes abbreviated as PK (from Ancient Greek pharmakon ""drug"" and kinetikos ""moving, putting in motion""; see chemical kinetics), is a branch of pharmacology dedicated to determining the fate of substances administered externally to a living organism. The substances of interest include pharmaceutical agents, hormones, nutrients, and toxins. It attempts to discover the fate of a drug from the moment that it is administered up to the point at which it is completely eliminated from the body.Pharmacokinetics describes how the body affects a specific drug after administration through the mechanisms of absorption and distribution, as well as the chemical changes of the substance in the body (e.g. by metabolic enzymes such as cytochrome P450 or glucuronosyltransferase enzymes), and the effects and routes of excretion of the metabolites of the drug. Pharmacokinetic properties of drugs may be affected by elements such as the site of administration and the dose of administered drug. These may affect the absorption rate. Pharmacokinetics is often studied in conjunction with pharmacodynamics, the study of a drug's pharmacological effect on the body.A number of different models have been developed in order to simplify conceptualization of the many processes that take place in the interaction between an organism and a drug. One of these models, the multi-compartment model, gives the best approximation to reality; however, the complexity involved in using this type of model means that monocompartmental models and above all two compartmental models are the most-frequently used. The various compartments that the model is divided into are commonly referred to as the ADME scheme (also referred to as LADME if liberation is included as a separate step from absorption): Liberation - the process of release of a drug from the pharmaceutical formulation. See also IVIVC. Absorption - the process of a substance entering the blood circulation. Distribution - the dispersion or dissemination of substances throughout the fluids and tissues of the body. Metabolization (or biotransformation, or inactivation) – the recognition by the organism that a foreign substance is present and the irreversible transformation of parent compounds into daughter metabolites. Excretion - the removal of the substances from the body. In rare cases, some drugs irreversibly accumulate in body tissue.The two phases of metabolism and excretion can also be grouped together under the title elimination.The study of these distinct phases involves the use and manipulation of basic concepts in order to understand the process dynamics. For this reason in order to fully comprehend the kinetics of a drug it is necessary to have detailed knowledge of a number of factors such as: the properties of the substances that act as excipients, the characteristics of the appropriate biological membranes and the way that substances can cross them, or the characteristics of the enzyme reactions that inactivate the drug.All these concepts can be represented through mathematical formulas that have a corresponding graphical representation. The use of these models allows an understanding of the characteristics of a molecule, as well as how a particular drug will behave given information regarding some of its basic characteristics. Such as its acid dissociation constant (pKa), bioavailability and solubility, absorption capacity and distribution in the organism.The model outputs for a drug can be used in industry (for example, in calculating bioequivalence when designing generic drugs) or in the clinical application of pharmacokinetic concepts. Clinical pharmacokinetics provides many performance guidelines for effective and efficient use of drugs for human-health professionals and in veterinary medicine.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report