Absorption: This is the process by which a drug enters the bloodstream from its site of administration. Factors like the route of delivery (oral, intravenous, topical), the drug’s solubility, and the physiological environment (such as stomach pH) influence how much of the drug reaches systemic circulation.
Metabolism: The body, primarily the liver, chemically alters the drug to make it easier to excrete. This often involves transforming active drugs into inactive metabolites, though some "prodrugs" are designed to become active only after metabolism. Basic Pharmacokinetics and Pharmacodynamics: An...
Basic Pharmacokinetics and Pharmacodynamics: An Introduction Absorption: This is the process by which a
Pharmacology is built on two fundamental pillars: pharmacokinetics (PK) and pharmacodynamics (PD). Understanding these concepts is essential for determining how drugs move through the body and how they exert their therapeutic effects. While they are distinct fields of study, they are deeply interrelated and together dictate the clinical outcome of any drug therapy. Pharmacokinetics: What the Body Does to the Drug This often involves transforming active drugs into inactive
Efficacy and Potency: Efficacy refers to the maximum effect a drug can produce, while potency refers to the amount of drug required to produce a specific intensity of effect. The PK/PD Connection
Excretion: Finally, the drug and its metabolites are removed from the body. The kidneys are the primary organs for excretion via urine, though drugs can also be cleared through bile, sweat, or breath. Pharmacodynamics: What the Drug Does to the Body