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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 ...
Therapy of hypertension
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... Start by (triple therapy) using a combination of 3 drugs e.g thiazide +B B +vasodilator?????? N.B: In patients with renal impairment, thiazides are contraindicated so, loop diuretics as frusemide are recommended. Beta blockers can be replaced with a central α2 agonist as (clonidine and α methyl dopa ...
EpiTan in Collaboration to Develop Sustained Release Form of
EpiTan in Collaboration to Develop Sustained Release Form of

... Release Form of Melanotan Drug EpiTan, based in Melbourne, Australia, will collaborate with the Southern Research Institute of the US, in which Southern Research will develop a sustained-delivery formulation of Melanotan that requires only one injection for up to a six month period, for use in the c ...
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VIEWS & REVIEWS - BMJ Press Releases

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New Drugs 2016 - Oregon Academy of Family Physicians
New Drugs 2016 - Oregon Academy of Family Physicians

... • extended therapy (>12 months) compared with 12‐month therapy – reduction in stent thrombosis (NNT 100‐250) and MI (NNT 50‐125), but increased risk of major bleeding (NNH 111‐325). – increase in all‐cause mortality with extended DAPT beyond one year 2.0% vs. 1.5%; NNH 200 driven by non‐cardiovascul ...
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Drug, substance that affects the function of living cells

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Nasal Drug Delivery in EMS
Nasal Drug Delivery in EMS

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Section 9A
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... Thus for A to decrease from 2 M to 1 M will take just as much time as decrease from 0.1 M to 0.05 M. For other types of reactions the half-lives do depend on the initial concentration of reactant. In general the expression describing relationship between [reactant] and half-life is as follows: t ...
Antiarrhythmic drugs
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orodispersible_dosage_forms

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Acetazolamide Acetazolamide sodium
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... do not increase the effect. Glaucoma, secondary or acute congestive (closed-angle). Adults, short-term therapy: 250 mg q 4 hr or 250 mg twice a day. Adults, acute therapy: 500 mg followed by 125–250 mg q 4 hr using tablets. For extended-release capsules, give 500 mg twice a day in the morning and ev ...
Pharmacology Review #1 - Madison County Emergency Medical
Pharmacology Review #1 - Madison County Emergency Medical

... Ask the patient if there is a possibility that she could be pregnant. Some drugs may have an adverse effect on the fetus of a pregnant female. Teratogenic drug…is a medication that may deform or kill the fetus. ...
tresaderm
tresaderm

... On rare occasions dogs may be sensitive to neomycin. In these animals, application of the drug will result in erythema of the treated area, which may last for 24 to 48 hours. Also, evidence of transient discomfort has been noted in some dogs when the drug was applied to fissured or denuded areas. Th ...
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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.
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