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Pharmaceutics
Introduction and Micromerics
41
Biology
Graduate
01/31/2012

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Term
pharmaceutics
Definition
-design and manufacture of drug products
Term
categories
Definition
-physical form
-delivery route
-release profile
Term
desirable attributes
Definition
-API identity
-purity
-quantity
-uniformity
-stability
-ease of administration
-drug release
-manufacturability
-low cost
Term
micromerics
Definition
-science of small particles
Term
impact on dosage forms
Definition
-dissolution
-suspendability
-uniformity distribution of active in a dry powder blend
-penetrability of particle intended to be inhaled
-non-grittiness of particles in dermal preparations
Term
smallest visible particle
Definition
40 um
Term
red blood cell size
Definition
5 um
Term
solid dosage form
Definition
-not as easy to handle
-more stable
Term
liquid dosage form
Definition
-easier to handle
-less stable
Term
particle size analysis techniques
Definition
-sieving (method by weight)
-microscopy (method by number)
-light diffraction (method by volume)
Term
d50
Definition
50% of particles smaller than this number
Term
comminution
Definition
-mechanical process of reducing the size of particles and aggregates
Term
sieving
Definition
delumping
Term
trituration
Definition
mortar and pestle
Term
levigation
Definition
-use solvents
-for ointments
Term
pulverization by intervention
Definition
-for hard materials
-dissolve in solvent to make finer particles
Term
if you want a more soluble dosage form
Definition
-increase surface area
Term
if you want more stable dosage form
Definition
-decrease SA
Term
measure SA
Definition
BET method
Term
SA depends on
Definition
particle size (INVERSELY)
Term
void volume
Definition
-empty space
Term
bulk volume
Definition
true V + bulk V
Term
bulk density
Definition
apparent density
Term
porosity (%void space)
Definition
Void/Bulk x 100
Term
true density
Definition
constant
Term
bulk density
Definition
not constant
Term
helium pycnometry measures
Definition
true density
Term
bulkiness
Definition
1/bulk density
Term
do powders flow well?
Definition
no
Term
flowability factors
Definition
-particle size/shape
-surface
-density
-statis charge
-moisture
-glidant
Term
compressibility index
Definition
-Carr index
-(Vbulk-Vtap)/Vbulk x 100
-higher the Carr index = lower the flow
Term
Hausner ratio
Definition
Vbulk/Vtap
Term
angle of repose
Definition
-direct flowability measurement
-pass material thru sieve
-machine records angle
-flatter the cone=better the flow
Term
hygroscopicity
Definition
-% relative humidity
-P(water)/Psat(water) x 100
Term
equilibrium moisture content depends on
Definition
-humidity/temp
-crystallinity
Term
moisture sorption rate depends on
Definition
-SA
-exposure time
Term
deliquescence
Definition
to become liquid by absorbing moisture from the air
Term
lower the particle size
Definition
the higher the SA
Term
the bigger the particle size
Definition
the smaller the SA, the better the flow
Term
most hydroscopic
Definition
amorphous free base
Term
crystalline free base
Definition
least hydroscopic
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