When you take a drug, you do that because you want an effect – reduced
headache, relief from an asthma attack, lower blood pressure, or something
else. When you swallow a tablet, the substance in it is absorbed and distributed
in the body, before being metabolized and/or eliminated. The science
that deals with this is pharmacokinetics, abbreviated PK. It involves a modelling
part in which data obtained from clinical studies are used to describe
how the drug is handled by and distributed in the body. Clinical pharmacokinetics
is the bedside application of this information, assuring that the drug is
appropriately used in the treatment of a medical condition.
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