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Pharmacokinetics (PK)
Pharmacokinetics involves studying the time course of drug absorption, distribution, metabolism, and elimination (ADME) in the body.
Ingestion


Bloodstream
Distribution

Metabolisation

Elimination

Pharmacodynamics (PD)
Pharmacodynamics focuses on the biological and physiological effects of the drug, including the relationship between drug concentration and effect. It examines:
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The mechanism of the drug
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The relationship between drug dose and therapeutic effect
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The onset, duration and intensity of the drug's effect



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