is the study of how chemical substances interact with biological systems, covering therapeutic and toxic effects.

Context: Pharmacology definition and scope

describes liberation, absorption, distribution, metabolism, and excretion (LADME) of chemicals from the body.

Context: Pharmacokinetics vs pharmacodynamics

describes the effects of drugs on biological systems, especially via interactions with receptors and targets.

Context: Pharmacodynamics

Liberation, absorption, distribution, metabolism, and excretion are collectively summarized as .

Context: Meaning of LADME

Pharmacokinetics controls drug exposure at targets, which then determines receptor/target-mediated actions; therefore, pharmacokinetics causes which leads to .

Context: Cause→effect relationship: PK exposure to PD effects

A drug binds to a chemical target with a certain binding affinity; this causes which influences .

Context: Cause→effect relationship: binding affinity to effect magnitude

Ligand binding assays quantify drug binding affinity to chemical targets; this bridges molecular target interactions to outcomes.

Context: Role of ligand binding assay in PK/PD integration

A tissue sample in an organ bath is exposed to a drug; this causes physiological responses to be recorded and used to analyze the drug’s effects on tissue.

Context: Meaning and purpose of organ bath

The organ bath connects tissue samples to recording devices to measure physiological responses after drug application; this method supports study of tissue-level drug effects.

Context: Organ bath as an experimental method for pharmacodynamics

Clinical pharmacology applies pharmacological methods to study drugs in humans, including dosage study ().

Context: Posology

Pharmacology is science-oriented research on drug actions, while pharmacy is a health service profession applying those principles in clinical care; therefore, pharmacology supplies evidence used in practice.

Context: Pharmacology vs pharmacy

Only one out of every 5000 potential new medicines reaches the open market; this highlights the need for the and pipeline.

Context: Drug discovery and drug development pipeline distinction

A medicinal chemist alters chemical structure during optimization (guided by ) and synthesizes analogues.

Context: Structural activity relationship (SAR)

In photopharmacology, light activates or deactivates a drug reversibly; this causes drug activity to be controlled in time and space, which helps reduce unwanted and environmental pollution.

Context: Photopharmacology cause→effect chain

The study of variations in drug effects within or between populations is called .

Context: Wider context: pharmacoepidemiology