What is Pharmacokinetics?
[[File:Linear PK Example.png|thumb|The blue line shows the concentration of a drug in the blood, at a given moment in time. The drug is taken once a day. It takes the body four days to completely absorb one dose of the drug.In 12 hours, concentration in the blood is halved. This is known as [[elimination half-life]]. ]] '''Pharmacokinetics''' is a branch of [[pharmacology]] which studies what the body does to a [[drug]]. Pharmacokinetics looks at how a [[substance]] enters, moves through and exits the body. It relates how the dose delivered affects the concentration within the body. It is closely related to another branch of pharmacology, pharmacodynamics, which describes how a drugs affects the body. [[Category:Pharmacology]]