(Prelim) Introduction Flashcards
Investigation of physical and chemical properties of drug molecules.
Pharmaceutics
Design, fabrication, and evaluation of Drug Delivery Systems
Pharmaceutics
Monitoring of how the drug is absorbed, distributed, metabolized, and excreted in the body
Pharmaceutics
INVESTIGATION OF PHYSICAL AND CHEMICAL PROPERTIES OF DRUG MOLECULES.
PHYSICAL PHARMACY
Physical form
Physical Properties
Particle size
Physical Properties
Melting point
Physical Properties
Solubility & Dissolution
Physical Properties
Partition Coefficient
Physical Properties
Refractive index
Physical Properties
Specific Gravity
Physical Properties
Chemical structures
Chemical Properties
Optical Activity
Chemical Properties
Polymorphism
Chemical Properties
Ionization
Chemical Properties
Complexation and Protein
binding
Chemical Properties
most often a formulation of the drug with various excipients
dosage form
administered to a patient as a specific drug product which is a particular dosage form.
drug
can be formulated in a variety of dosage forms and can be administered in different routes of administration
Drug products
Drugs that are administered in a certain route should be __________ in order for them to become bioavailable to the systemic circulation.
absorbed
Monitoring of how the drug is absorbed, distributed, metabolized, and excreted in the body.
PHARMACOKINETICS
8 mg/L
peak concentration
1.5 hours
time of peak
ADBE
Absorption, Distribution, Biotransformation, Excretion
Study of the physicochemical properties of drugs and their proper dosage form as related to the onset, duration, and intensity of drug action
BIOPHARMACEUTICS
2 types of solid in Physical Form
Crystalline Solid
Amorphous Solid
most common solid
Crystalline Solid
distinct melting point
Crystalline Solid
boiling point 190°C-192°C
Crystalline Solid
wider melting point
Amorphous Solid
not repeated arrangement of atoms
Amorphous Solid
different melting point
Amorphous Solid
180°C - 190°C
Amorphous Solid
affect the stability & pharmacokinetics drugs
particle size
polar & non-polar
Solubility & Dissolution
- equilibrium
- forces of attraction: higher
- 190°C- 192°C
Melting Point
determine substance purity
Melting Point
measure of drug concentration in nonpolar organic phase relative to the polar aqueous phase
Partition Coefficient
hates water and loves lipids
Hydrophobicity (or lipophilicity)
- hates water
- lipid-loving
hydrophobic
non-polar
lipids
ability of substance to rotate plane polarized light.
Optical Activity
measure of how much the speed of light bends or reduced inside a medium
Refractive Index
include peripheral neuropathy, constipation, fatigue, and sedation.
Thalidomide toxicity
If a compound rotates plane polarized light in the clockwise (+) direction, it is said to be ____________
dextrorotatory
the presence of two or more variant forms of a specific DNA sequence that can occur among different individuals or populations.
Polymorphism
if it rotates light in the counterclockwise (-) direction it is ____________
levorotatory
failure to calibrate
Instrumentation Errors
may be defined as a deviation from the absolute value or from the true average of a large number of results
Errors
affects absorption
pH and Ionization
3 TYPES OF DETERMINATE ERROR
- Instrumentation Errors
- Method Errors
- Personal Errors
degredation of parts
Instrumentation Errors
TYPE OF ERRORS
- Determinate Errors
- Indeterminate Errors
- Pseudo-accidental or Variable Determinate Errors
errors due to non-ideal physical or chemical behavior
Method Errors
power fluctuation
Instrumentation Errors
flaws introduced by the observer
Personal Errors
errors that can be measured
DETERMINATE ERROR
usually detectable and can be corrected
DETERMINATE ERROR
arises from the design of experiment
DETERMINATE ERROR
error by chance/ accidental in nature
INDETERMINATE ERROR
limitations of reading balances,
scales such as rulers or dials, and
electrical “noise” in instruments.
INDETERMINATE ERROR
They arise from random fluctuation in
temperature or other external factors,
changes in pH
PSEUDO-ACCIDENTAL/
VARIABLE DETERMINATE
environmental factors
PSEUDO-ACCIDENTAL/
VARIABLE DETERMINATE
same production
Repeatability
reproducibility and repeatability
PRECISION AND ACCURACY
2 Types of Precision
- Repeatability
- Reproducibility
the precision when a single analyst completes the analysis in a single session using the same solutions, equipment, and instrumentation.
Repeatability
the precision under any other set of conditions, including between analysts,
or between laboratory sessions for a single analyst.
Reproducibility
- different time
- same day, different analyst
Reproducibility