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Physiochemical properties of drugs
Module 1.1
13
Pharmacology
Graduate
11/22/2011

Additional Pharmacology Flashcards

 


 

Cards

Term
Receptor
Definition
a protein (amino acids that are coded by dna)
Term
#1) Bond strength from weak to strong
Definition

van der Waals

Hydrogen

ionic

covalent

Term
Van der Waals
Definition
Shifting electron density, transient positive or negative charge that interact with areas of opposite charge on another molecules
Term
Hydrogen bond
Definition
Hydrogen atoms bound to nitrogen or oxygen that become positively polarized--> bond more negatively polarized atoms like o2, nitrogen, sulfur
Term
Ionic
Definition
Atoms with an excess of electrons (thus negative) attracted to deficient atoms (thus positive)
Term
Covalent
Definition

Two bonding atoms share the electrons, mostly irreversible, very strong

 

eg aspirin

Term
#2) Lipophilicity
Definition

lipophilic portion of drug wants to bond to lipophilic part of receptor

 

not always drug as a whole that is considered lipophilic

Term
#3) Ionization
Definition
involves pH of body and pKa of drug
Term
4#) stereochemistry
Definition

enantiomers (mirror images)

-racemic mixture-both mirror images included

-can isolate seperate enantiomers to market new drug

 

(eg celexa (citalopram-racemic) Lexapro-escitalopram, more active of mix)

Term

#5) Conformation

Molecular Drug-receptor interactions

Definition

Transmembrane

Intracellular

extracellular

Term
Transmembrane interaction
Definition

 drug binding to extracellular part to cause an effect intracellularly

*doesnt have to cross membrane to cause effect

 

eg. ion channel, linked to G-proten, enzyme with cytosolic domain

Term
Ion Channel
Definition

Sodium, Calcium, Potassium channel

-drug binds and causes channel to open or close cause or preventing influx of ions

Term
Intracellular
Definition
drug is lipophilic and crosses membrane to have effect
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