clinical pharmacokinetic

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Presentation Transcript

Slide 1: 

A Seminar on Clinical Pharmacokinetics Guide :- Submitted by:- Dr. Ravi Shanbhogue Ajay Thakur

INDEX : 

INDEX Introduction Half- life Steady state Clearance Volume of distribution Significance

Clinical Pharmacokinetics : 

Clinical Pharmacokinetics Study of movement of drugs Affected by: Absorption Distribution Metabolism Excretion

Absorption : 

Absorption Movement of drug from site of administation to systemic circulation

Time to Peak Concentration : 

Time to Peak Concentration

Distribution : 

Distribution Movement of drugs between the compartments

Metabolism : 

Metabolism Conversion of one form of drug into another Mainly takes place in liver Types of metabolic reaction Phase I (Cytochrome P450 system) Phase II

Steady state : 

Steady state Steady State: the amount of drug administered is equal to the amount of drug eliminated within one dosing interval resulting in a plateau or constant serum drug level Drugs with short half-life reach steady state rapidly; drugs with long half-life take days to weeks to reach steady state

Half-life : 

Half-life t ½= time required for serum plasma concentrations to decrease by one-half (50%) 4-5 half-lives to reach steady state

Clearance : 

Clearance Theoretical volume of the plasma from which the drug is completely removed in unit time CL=rate of elimination /C Types of clearance Renal clearance Hepatic clearance

Clearance : 

Clearance Clrenal+ CLhepatic+ CLother =CL RENAL CLEARANCE= Rate of urinary excretion/plasma drug concentartion

Volume of distribution : 

Volume of distribution Accommodate all the drug in the body V=dose administered i.v./plasma concentration

Why Study Pharmacokinetics (pk) : 

Why Study Pharmacokinetics (pk) Individualize patient drug therapy Monitor medications with a narrow therapeutic index Decrease the risk of adverse effects Evaluate pk/pd as a diagnostic tool Used in study of clinical trials

THANK YOU : 

THANK YOU