Exam 1 Flashcards
Definition of Pharmacology
Study of introducing chemical agent into a living system (Origin, Chemistry & Effects of a drug)
Definition of Pharmacodynamics
Effects of drug on living system
Definition ofPharmacokinetics
How the body response to a drug (4 aspects)
1) Absorption
2) Distribution
3) metabolism
4) Elimination
Definition of Prodrug
Drug that’s INACTIVE when you take it
B1 is in the…
Heart
B2 is in the…
Non vascular smooth muscle (causes it to relax)
Definition of Pharmacotherapeutics
Use of drugs to Dx, Tx or prevent disease
Definition of Toxicology
Study of Poisons
Definition of Pharmacognosy
Study of drugs in crude form (original source/plant-based)
Definition of Drug vs. Medication
Drug: ONE chemical agent
Med: ONE OR MORE chemical agents
Definition of Synergism
1+1=21 (sum of 2 or more agents is greater than sum of individual effects) “enhancing”
Definition of Antagonism
Blocks effect of agonist
Example of Antagonism
Naloxone Tx for Heroin overdose
Definition of Hypperactivity
Response greater than anticipated to a given dose
Definition of Tolerance
Prolapsed exposure to liver causes enzyme induction (liver increases enzyme to inactivate the drug)
Definition of Tachyphylaxis
Form of tolerance that only occurs after 2-3 doses
Definition of Adverse reaction
Reaction that warrants DC of the drug
Definition of Habituation
Psychological Dependance
Definition of Addiction
Physical Dependance
Definition of Bioavailability
What % of dose really makes it to the target tissue
Definition of First-Pass Effect
Effect the liver, stomach, intestines has on drug
Liver is MC to break down
What is the most effective way to deliver a drug?
IV so it bypasses the Liver
Definition of Proprietary
Owns the Name of the Drug (BRAND NAME)
(ADVIL)
Definition of Non-Proprietary
Same drug but under a different name (WALGREEN”S BRAND)
Patient-Related Factors that influence Drug Safety & Effectiveness (10)
1) Weight (mg/kg)
2) Age (young & old)
3) Sex
4) Physiological
5) Pathological
6) Nutrition
7) Allergy-Hypersensitivity Reaction
8) Enzyme Induction
9) Hormonal Factors
10) Pt. Compliance
Definition of Dyscrasias
Abnormal Blood Work
Do side effects affect Compliance?
YES
What are Concomitant drugs?
Taking 2 or more drugs at the same time
Most Thearapeutic bonds are…
IONIC
What are ionic therapeutic bonds?
Weak, easily digested, used and excreted
What is a covalent therapeutic bond?
IRREVERSIBLE/not wanted
Indy’s to heavy metals and pulls it out of the tissue
What type of curve is the Dose-Response Curve?
Logarithmic Curve
Definition of Potency
How much your taking (DOSE)
Definition of Slope
Steeper the slope, less of the drug you have to take to get the same effect
Definition of Maximal efficacy
Effect (variability)
Definition of Median Effective Dose (ED50)
Dose at which 50% of population will get the maximum effect
Definition of Median Lethal dose (LD50)
Dose at which 50% of population will die if they take that dose
Definition of Theurpeutic Index
[LD50 / ED50]
Higher TI -> less likely to kill you
Example of Competitive drug
Atropine for nerve gas
MC route for absorption
Simple Passive diffusion
MC route for absorption in GI tract
ORAL (1st order kinetics)
Inhalation is the…
2nd Most Effective way to absorb (B2 receptors)
Parenteral Administration most effective route
IV
Definition of Zero-Order Kinetics
Drug absorbption that proceeds at a constant rate
(Can give all @ once or push w/ an IV)
Definition of First-Order Kinetics
Absorption that proceeds @ a changing rate but is always proportional to the amount absorbed (take 500mg and after 1 hour have 250mg left)
Definition of Drug Metabolism
Converting pharmacologically inactive drug into metabolites
Example of a Prodrug
Theophylline for Asthma
Definition of Phase I of Biotransformation
Inactivation of a drug to diminish its overall effect
Example of Phase I Biotransformation
1) Hydrolysis
2) Oxidation
3) Reduction
Definition of Phase II Biotransformation
To convert lipid sable into water soluble
Examples of Phase II Biotransformation
1) Glucuronide Formation
2) Acetylation
3) Sulfate Conjugation
4) Methylation
Example of Glucunoride Formation
Unconjugated Bilirubin -> Glucunoride Formation -> H20 soluble (Conjugated)
Major pathway of drug excretion:
Renal Excretion
2nd MC pathway of Excretion:
Biliary Excretion
Oral Meds are what order kinetics?
1st
IV Meds are what order kinetics?
Zero
What does Elixir mean?
Med has a % of alcohol in it
1 teaspoon =
5mL or 5 cc’s
1 Tablespoon =
3 teaspoons, 15mL or 15 cc’s
1 ounce =
2 Tablespoons, 6 teaspoons or 30 cc’s
3 major functions of the Autonomic NS
1) heart
2) Secratory function
3) contraction/Relaxation of Smooth muscle
3 Major elements of the Autonomic NS
1) Afferent Limb
2) Central Intergrated Elements
3) Efferent Limb
What does the Afferent limb of the Autonomic NS do?
Carries sensory from peripheral to spinal cord (GVA)
What does the Central Integrated Element of the Autonomic NS do?
Info is processed to Hypothalamus/Lower brain
What does the Efferent limb of the Autonomic NS do?
Carrie motor to neuroeffector tissues (GVE)
What receptors are located in the Parasympathetic NS?
ALL Cholinergic (ACh)
What receptors are located in the Sympathetic NS?
Mostly Noradrenergic (norepinephrine)
Parasympathetic vs. Sympathetic Effects on the Heart:
P: Slow down
S: Speed up
Parasympathetic vs. Sympathetic Effects on the Sexual Organs:
P: Arousal
S: Orgasm
Primary neurotransmitter of the Cholinergic System is _________ and it is released from the ____________.
ACh; PREsynaptic & POSTsynaptic Axon terminal
Cholinoceptors (2)
1) Muscarinic (autonomic NS)
2) Nicotinic
Edinburg Westphal Nucleus: CN & Function
3; smooth eye muscle
Superior Salivatory Nucleus: CN & Function
7; Lacrimal glands & Salivary Glands (except parotid)
Inferior Salivatory Nucleus: CN & Function
9; Parotid Gland
Dorsal Motor Nucleus of the Vagus Nerve: CN & Function
10; Thoracic & Abdominal Viscera
Basic functions of the Parasympathetic NS
1) dec. Heart rate
2) inc. GI secretions
3) miosis
4) Near vision accommodation
5) defecation
6) Emptying Bladder
7) Bronchial smooth Muscle contraction
Enzyme for ACh:
Acetylcholinesterase
Type 2 Nicotinic receptors are located
In all autonomic NS ganglia & the Adrenal Medulla
Stimulation of Type 2 Nicotinic receptors results in the release of…
1) ACh (parasympathetic)
2) norepinephrine (sympathetic)
3) epinephrine (adrenal medulla)
Type 1 Nicotinic receptors are located
At NMJ of somatic muscles
Function of Type 1 Nicotinic receptors
Skeletal Muscle Contraction
Muscarinic Receptors are located in
All parasympathetic target organs
Function of Muscarinic Receptors
1) Near vision (ciliary muscles)
2) Miosis (iris sphincter
3) Dec. heart rate
4) contract Bronchi
5) GI secretion
6) Sweating
7) Penile erection
8) Vasodilation
2 sites where drugs can act in the autonomic NS
1) Synapse between Pre & Post ganglionic neurons
2) Junctions between post ganglionic & effector organ
Definition of Direct Stimulation Neurotransmitter
Drugs mimic same effect as ACh or Norepinephrine
Definition of Indirect Neurotransmitter Stimulation
Drugs given that inactivate an enzyme (ACh-nerve gas)
Definition of Block Receptor Neurotransmitter
Drugs that compete for same receptor site