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