Week 1: Antibiotic Overview Flashcards
Objectives

What is bioavailability?
Subcategory of absorption and is the fraction of an administered does of unchanged drug that reaches the systemic circulation
- Measurement of the rate and extent to which a drug reaches the systemic circulation
What is the first-pass effect?
A phenomenon of drug metabolism whereby the concentration of a drug is greatly reduced before it reaches the systemic circulation
- four primary systems that affect the first-pass effect of a drug are the enzymes of the GI lumen, gut wall, bacterial and hepatic enzymes
What is parenteral administration?
Administered by some means other than oral or rectal (IV, IM, SC)
What is bioequivalence?
FDA standards for bioavailability to insure that different formulations of the identical quantity of the same drug results in equal therapeutic response
How do drugs reach their site of action

What is enteral administration?
Intestine
- Placement of a drug directly into any part of the GI tract. includes oral (per os, p.o.), sublingual or rectal
What is parenteral administration?
Aside from intestine
- Bypassing the GI tract
- Includes Injection (subcutaneous (s.c.), intramuscular (i.m.) and intravenous (I.v.), topical application or inhalation by the lungs
What is absorption?

Stomach absorption

stomach absorption 2

Small-intestine absorption

Anatomy of the small-intestine

Large intestine & rectum absorption

Absorption from the respiratory tract

Lung absorption

Absorption from subcutaneous sites

Absorption from intramuscular sites

Intravenous absorption

Question

Question

Discuss features of distribution

Describe magnitude of distribution

Discuss magnitude of distribution II


























