Pharmacokinetic (ADME) | Excretion of Drug From Body | Drug Excretion | Kinetics of Elimination
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- čas přidán 10. 03. 2019
- Route of Drug Elimination- • Pharmacokinetics | ADM...
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Pharmacokinetics is currently defined as the study of the
time course of drug absorption, distribution, metabolism, and excretion.
Pharmacokinetics of a drug depends on patient-related factors as well as on the drug’s chemical properties. Some patient-related factors (eg, renal function, genetic makeup, sex, age) can be used to predict the pharmacokinetic parameters in populations. For example, the half-life of some drugs, especially those that require both metabolism and excretion, may be remarkably long in the elderly
In pharmacology (and more specifically pharmacokinetics), absorption is the movement of a drug from the site of administration to the bloodstream.
Before drugs can be clinically effective, they must be absorbed. Absorption is the process of a drug moving from its site of delivery into the bloodstream. The chemical composition of a drug, as well as the environment into which a drug is placed, work together to determine the rate and extent of drug absorption. Absorption involves several phases. First, the drug needs to be introduced via some route of administration (oral, topical-dermal, etc.) and in a specific dosage form such as a tablet, capsule, solution and so on. Drug absorption is determined by the drug’s physicochemical properties, formulation, and route of administration. Dosage forms (eg, tablets, capsules, solutions), consisting of the drug plus other ingredients, are formulated to be given by various routes (eg, oral, buccal, sublingual, rectal, parenteral, topical, inhalational). Regardless of the route of administration, drugs must be in solution to be absorbed. Thus, solid forms (eg, tablets) must be able to disintegrate and deaggregate.
Pharmacokinetic- “What does BODY 1 do to the DRUG 2” we have simple interchanged the BODY and DRUG to make a definition. And as per the definition, our body responds to any drug by giving ADME effects.
1. A Stands for - Absorption
2. D stands for - Distribution
3. M stands for - Metabolism
4. E stands for- Elimination
Drug excretion is the process of eliminating a drug from the body. A drug, which is either biologically active itself or a prodrug, may be excreted in its original chemical state. Alternatively, all or a portion of a drug may undergo chemical modification and be eliminated as biologically active, or inactive, metabolites (see the record on Drug Biotransformation) renal excretion plays an important role in eliminating unchanged drugs or their metabolites into the urine. A major characteristic of compounds excreted in urine is that they are polarized (i.e., charged) and water-soluble. Drugs that are lipid-soluble are not readily removed by the kidneys and require hepatic metabolism (e.g., phase I and phase II biotransformation reactions) to increase their water solubility for possible urinary excretion.
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@@solutionpharmacy sir I didn't find your lecture on "kinetics of elimination "
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Please make lecture on first pass metabolism and Kinetics of elimination.
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Sir is there video on kinetics of elimination ???
once again excellent lecture, please tell simple book with diagrams
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Sir aap ne kinetic of elimination p video nai bnaya kya
Sir kinetics of elimination?
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Pl answer my question, what is excretion and what are the verious processes used in the excretion of crude drugs??
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We have many animation video on levodopa. Please watch.
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Koi drug humari body mai Kitna ersa rehtti hai?
Sir!! Which book u refer for pharmacology??
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@@solutionpharmacy sir.. K. D. T. Me kinetics of elimination भी दे रखा h..
1sr & o order kinetic..
With plateau principal....
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Sir aapne isme cleareance Miss krdiya plz btade usky bare me thora aura plasma half life bhi nahi btaya ?
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Nono pharmacokinetic ka video mujhe chahiye sir
in the zero order kinetics, either given constant or variable dose of drug but in both conditions rate of drug elimination is constant
this statement is true or false ??
plss answer sir
Yes correct. 0 order is free from cons
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Which book you're following?
KDT
Thank you sir for explaining pharmacokinetics study of drug elimination ...🙏
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sir i have a small doubt .. after absorption of drug, distribution is maximum in the part of brain , kidney and liver as the blood is higher in these compartments .sir I want to know to cross the brain barrier drugs need to be lipid soluble in nature . but liver try to make it water soluble so after metabolism how drug will act on brain . i am really confused in this section sir please help me .
Yes you are right but lipid soluble drugs are given by parenteral so they distributed to brain then go for metabolism
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Sir can you tell me name of book and author from which you get this all material ??
Many books including KDT, Lippincott, P Jagdish prasad, padmaja udaykumar etc
Sir those drug which not metabolic occure and eliminate from body this drug show effect or not 🤔🤔
No they will not show effect
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In tubular reabsorption, lipid soluble drugs are reabsorbed but how after even going through metabolism, drugs still lipid soluble
In phase of merabolism they try to convert it into polar
Renal And Hepatic Clearance Difference ? Please tell Sir
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