Exam 1 - Detailed Flashcards
From slides not study guide
What is Pharmaceutical Sciences?
Group of interdisciplinary studies (multiple fields of study) which look at the design, action, delivery and disposition of drugs
What are the 3 disciplines of study in Pharmaceutical Sciences?
Pharmaceutics
Biopharmaceutics
Pharmacokinetics
What does pharmaceutics look into?
The physiochemical properties of drugs and dosage forms (tablet, solution, etc.) as it relates to dosage form design
What does biopharmaceutics look into?
The interrelationship between the physiochemical PROPERTIES of drugs, the dosage forms (tab, solution, etc.), and the route of administration (oral, nasal, etc.) on RATE AND EXTENT of drug absorption into the body
What does pharmacokinetics study?
The movement of drugs within the body (fate after it is released from the dosage form)
Absorption
Distribution
Elimination
What is the purpose of drugs?
To cure or mitigate an abnormality of human physiology (insulin for diabetes)
How do drugs work?
Through interactions with drug targets
What are the 5 common macromolecules that act as drug targets?
Enzymes Ion Channels Membrane Transport Proteins Nuclear Hormone Receptors G-Protein Coupled Receptor (most common)
Where do drugs work for non systemic targets? (3 examples)
Skin
GI tract
Bronchioles
What is the pathway of a drug throughout the body if given orally (by mouth)?
Mouth Stomach/intestines (absorbs) Liver (detoxifies) Right side of heart (non oxygenated blood) Lungs (pick up oxygen) Left side of heart Rest of the body or brain
What is the pathway for IV (intravenous), IM (intramuscular), and SC/SQ (subcutaneous) injections throughout the body?
Site of injection (muscle, under skin, in veins) Blood circulation Right side of heart (non oxygenated) Lungs (pick up oxygen from alveoli) Left side of heart Rest of body or brain (drug target)
What are the main factors of a drugs distribution to its targets in the body?
Anatomical and Physiological factors based on route of administration
Blood flow to various tissues
Protein and tissue binding
Mass Transport (passive or active)
What does LADME mean and what is it in relation to?
The fate of the drug after it is administered
Liberation (release of drug from dosage form)
Absorption (into bloodstream)
Distribution (to various parts of the body)
Metabolism (by enzymes)
Excretion (through the kidneys or other routes)
How do we measure the amount of drug in the body?
Through the concentration of the drug in plasma or urine concentration (usually the urine concentration since it is less invasive)
What is the volume of distribution?
An indicator of how well distributed a drug is in the body
amount of drug in the body/ plasma concentration
What is bioavailability?
The proportion of an administered dose of unchanged drug that reaches systemic circulation
(the amount of drug that the body circulated in relation to the amount of drug given to patient)
What is clearance?
The volume of plasma cleared of drug per unit of time
What is half-life?
The time required for plasma concentration of drug to decrease by 50%
A patient says they feel dizzy and have not eaten that day. What is one QUANTITATIVE measure of effect would you check for?
Blood sugar levels
What route of administration would be given via between the cheek and gums?
Buccal (in anatomy means the cheek)
What route of administration would be given via the eye surface?
Ophthalmic (solution - eye drops)
What route of administration would be given via the mouth when swallowed?
Oral (solution, tablet, capsule)
What route of administration would be given via the nasal cavity?
Intranasal (Flonase spray, solution)
What route of administration would be given via the peritoneal cavity?
Intraperitoneal infusion
What route of administration would be given via the rectum?
Rectally (suppository/cream/ointment)
What route of administration would be given via the striated muscles (thigh, buttocks)?
Intramuscular injection (solution - testosterone)
What route of administration would be given via the subcutaneous fat?
Subcutaneous (under the skin) injection (solution- insulin)