Pharmacology Overview: Branches and Concepts

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Questions and Answers

Which of the following is NOT considered a mechanism of action for drugs?

Hormones (correct)
Ion channels
Enzymes
Receptors

Toxicology is a branch of pharmacology that studies the desired effects of drugs.

False (B)

What term is used to describe the transfer of drugs from the site of administration to the bloodstream?

Absorption

The presence of ______ generally decreases drug absorption in the digestive system.

<p>food</p> Signup and view all the answers

Match the following factors with their impact on drug absorption:

<p>Constipation = Increases absorption Diarrhea = Decreases absorption Liquid drugs = More readily absorbed Solid drugs = Less readily absorbed</p> Signup and view all the answers

Flashcards

Pharmacology

The study of drugs and their effects on the body.

Mechanism of Action (MOA)

How a drug works at a cellular level (chemical interactions with cells).

Pharmacokinetics

The movement of a drug within the body.

Drug Absorption

The process of a drug moving into the bloodstream.

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Food effect on absorption

Food can affect how quickly and easily medication gets into the bloodstream, sometimes decreasing absorbtion, sometimes increasing.

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Study Notes

Pharmacology Branches

Pharmacodynamics
Pharmacokinetics
Pharmacotherapeutics
Toxicology

Pharmacodynamics

Mechanism of Action (MOA): Active parts of cells that form chemical bonds with drugs include:
- Enzymes
- Ion channels
- Cell membrane
- Receptors
- DNA synthesis
- Chemical reactions (e.g., neutralization reactions like antacids)
- Physical reactions (e.g., adsorption with charcoal)
Clinical uses (desired effects of drugs)
Side effects (undesired effects of drugs)

Pharmacokinetics

Absorption: Transfer of drugs from administration site to bloodstream (occurs in small intestine)
- Factors affecting absorption:
  - Patient-related factors:
    - Food (often reduces absorption, except for some drugs)
    - Health (constipation increases, diarrhea decreases absorption)
  - Drug-related factors:
    - Liquid form is more readily absorbed than solid
    - Parenteral (injection) absorption is higher than oral
    - Smaller drug particle size is absorbed more readily than larger particle size

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Description

This quiz covers essential branches of pharmacology, including pharmacodynamics, pharmacokinetics, pharmacotherapeutics, and toxicology. Discover the mechanisms of action, absorption factors, and clinical uses of drugs to enhance your understanding of this vital field.