PHARMA first quiz Flashcards
any chemical that affects the physiologic processes of a living organism
Drug
study of poisons and unwanted responses to drugs and other chemicals
Toxicology
study or science of drugs
Pharmacology
study of how various drug forms influence the way in which the drug affects the body
Pharmaceutics
study of what the body does to the drug (absorption, distribution, metabolism, excretion)
Pharmacokinetics
study of what the drug does to the body; t he mechanism of drug actions in living tissues; drug- receptor relationships
Pharmacodynamics
focus on the clinical use of drugs to prevent and treat diseases
Pharmacotherapeutics
study of natural (versus synthetic) drug sources
Pharmacognosy
regarded as a branch of health economics which deals with identifying, measuring, and comparing the costs and consequences of pharmaceutical products and services
Pharmacoeconomics
list the types of drug names
- Chemical Name
- Generic Name
- Trade Name
describes the drug’s chemical composition and molecular Structure
Chemical name
name given by the United States Adopted Names Council, shorter than chemical name; used as official listing of drugs
Generic name
drug registered trademark; use of the name is restricted by the drug’s patent owner
Trade name
Drugs are classified by ?
Structure and Therapeutic Use
list the phases of drug activity
- Pharmaceutical Phase
- Pharmacokinetic Phase
- Pharmacodynamic Phase
disintegration of dosage form; dissolution of drug in body
what phase
Pharmaceutical Phase
absorption, distribution, metabolism, excretion
what phase
Pharmacokinetic Phase
drug- receptor interaction
what phase
Pharmacodynamic Phase
list Pharmaceutic Phases
- Disintegration
- Dissolution
Drug absorption of various oral preparations (fastest to slowest)
list them
Oral disintegration, buccal tablets, and oral soluble wafers
Liquids, elixirs, and syrups
Suspension solutions
Powders
Capsules
Tablets
Coated tablets
Enteric-coated tablets
- Oral
- Sublingual (fastest in oral route) 3. Buccal
- Rectal (can also be topical)
what route
EnteralRoute
- Intravenous
- Intramuscular
- Subcutaneous
- Intradermal
- Intraarterial
- Intraarticular
what route
Parenteral Route
- Skin (including transdermal patches)
- Eyes
- Ears
- Nose
- Lungs (inhalation)
- Rectum
- Vagina
- Urethra
- Colon
what route
Topical Route
drug is absorbed into the systemic circulation through the oral or gastric mucosa or the small
Intestine
Enteral Route
the term used for the hepatic metabolism of a pharmacological agent when it is absorbed from the gut and delivered to the liver via the portal circulation
First-pass Effect
list advantages of oral route
-convenient
-absorption
-cheap
list disadvantages of oral route
-sometimes inefficient
-first-pass effect
-irritation to gastric mucosa
the dosage is placed under the tongue
rapidly absorbed by sublingual mucosa
Sublingual Route
the dosage is placed between gums and inner lining of the cheek (buccal pouch)
absorbed by buccal mucosa
Buccal Route
Bioavailability 100%
Desired blood
Concentrations achieved
Large quantities
Vomiting & Diarrhea
Emergency situations
First-pass avoided
fastest delivery into the blood circulation
Intravenous Route
Absorption reasonably uniform Rapid onset of action
Mild irritants can be given
First-pass avoided
Intramuscular Route
Injected under the skin
Absorption is slow, so action is
prolonged.
Subcutaneous Route
Injections of antibiotics and corticosteroids are administered in inflamed joined cavities by experts.
Intraarticular Route
Drug is given within skin layers (dermis)
Painful
Mainly used for testing sensitivity
to drugs
Intradermal Route
Rarely used
Anticancer drugs are given for
localized effects
Drugs used for diagnosis of
peripheral vascular diseases
Intraarterial Route
Application of a drug directly to the surface of the skin
Includes administration of drugs to any mucous membrane
Topical Route
Absorption of drug through skin (systemic action)
Stable blood levels
No first-pass metabolism
Drug must be potent or patch
becomes too large
Transdermal Route
list liberation release types
-immediate
-delayed
-extended
Describes the way that a drug is released from its administered form
Liberation
formulated to release the medicinal drug without delay
Immediate
formulated to release medicinal drug sometime after it is taken
Delayed
formulated to make the drug available over extended period
Extended
Three Major Processes for Drug Absorption
- PassiveAbsorption
- ActiveAbsorption
- Pinocytosis
the transport of a drug by the bloodstream to its site of action
Distribution
Major site for metabolism
Liver
Major site for excretion
Kidney
Factors that Decrease Metabolism
- Cardiovascular dysfunction
- Renal Insufficiency
- Starvation
- Obstructive Jaundice
Factors that Increase Metabolism
- Barbiturate Therapy
- Rifampin Therapy
- Phenytoin Therapy
The elimination of drugs from the body
Excretion
The time it takes for one half (50%) of the original amount of a drug to be removed from the body. A measure of the rate at which a drug is removed from the body
Half-life
the cellular processes involved in the drug and cell interaction
Drug Actions
the physiologic reaction of the body to the drug
Drug Effect
Drug Effect includes ?
- Onset
- Peak
- Duration of action
the time it takes for the drug to elicit a therapeutic response or reach the minimum effective concentration (MEC) after administration
Onset
the time it takes for a drug to reach its maximum therapeutic response; occurs when it reaches highest concentration in the blood
Peak
the time a drug concentration is sufficient to elicit a therapeutic response; the length of time the drug exerts a therapeutic effect
Duration of action
Mechanisms of Action
- Receptor Interactions
- Enzyme Interactions
- Nonselective Interactions
It is the body’s physiologic response to changes in drug concentration at the site of action
Dose-response Relationship
refers to the amount of drug needed to elicit a specific physiologic response to a drug
Potency
the point at which increasing a drug’s dosage no longer increases the desired therapeutic response
Maximal Efficacy
describes the relationship between the therapeutic dose of a drug and the toxic dose of a drug; ratio of a drug’s toxic level to the level that provides therapeutic benefits
Therapeutic Index
the degree to which a drug attaches to and binds with a receptor
Affinity
Drug binds to the receptor; there is response
what drug type
Agonist
Drug binds to the receptor; the response is diminished compared with that elicited by an agonist
what drug type
Partial agonist
Drug binds to the receptor; there is no response. Drug prevents binding of agonists
what drug type
Antagonist
Drug competes with the agonist binding to the receptor. If it binds, there is no response
what drug type
Competitive antagonist
Drug combines with different parts of the receptor and inactivates it; agonist then has no effect
what drug type
Noncompetitive antagonist
It occurs when the drug chemically binds to an enzyme molecule in such a way that it alters (inhibits or enhances) the enzyme’s interaction with its normal target molecules in the body
Enzyme Interactions
Cholinergic Receptors are located in the ?
list them
Bladder
Heart
Blood Vessels
Stomach
Bronchi
Eyes.
Three Different Receptors
-Alpha1
-Beta1
-Beta2
Four Receptor Families
- Cell membrane-embedded enzymes
- Ligand-gated ion channels
- G protein-coupled receptor
systems - Transcription factors
Types of Therapies
- Acute therapy
- Maintenance therapy
- Supplemental/replacement
therapy - Palliative therapy
- Supportive therapy
- Prophylactic therapy
- Empiric therapy
Any characteristic of the patient, especially a disease state, that makes the use of a given medication dangerous for the patient
Contraindications
decreasing response to
repeated drug doses
Tolerance
physiologic or psychological need for a drug
Dependence
physiologic need for a drug to avoid physical withdrawal symptoms
Physical Dependence
known as addiction; obsessive desire for the euphoric effects of a drug
Psychological Dependence
two drugs with similar actions are given together (1 + 1 = 2)
Addictive Effect
two drugs administered together interact in which their combined effects are greater than the sum of the effects for each drug given alone (1 + 1 = greater than 2)
Synergistic Effect
occur when the combination of two drugs results in drug effects that are less than the sum of the effects for each drug given separately (1 + 1 = less than 2)
Antagonistic Effect
two parenteral drugs or solutions are mixed together and the result is a chemical deterioration of one or both of the drugs
Incompatibility
any undesirable occurrence involving medications
Adverse Drug Events
preventable situation in which there is a compromise in the “Rights” of medication use
Medication Error
any reaction to a drug that is unexpected and undesirable and occurs at therapeutic drug dosages
Adverse Drug Reaction
is genetically determined abnormal response to normal dosages of a drug
Reaction
effects of drugs result in structural defects in the fetus
Teratogenic
effects results to permanent changes in the genetic composition of living organisms and consist of alterations in chromosome structure
Mutagenic
cancer-causing effects of drugs, other chemicals, radiation, and viruses
Carcinogenic
Four (4) Main Sources of Drugs
- Plants
- Animals
- Minerals
- Laboratory Synthesis
testing in healthy subjects
what phase of clinical trial
Phase 1
testing in healthy individuals with the diseases
what phase of clinical trial
Phase 2
larger scale testing in individuals with the disease
what phase of clinical trial
Phase 3
prohibited the sale of misbranded or adulterated food and drugs
what act
Pure Food and Drug Acts
require that drug products, both prescription and non prescription, must be pure, effective and safe
what act
Federal Food, Drug, and Cosmetics Act of 1938
allows FDA to set good manufacturing practices and mandated regular inspections of production facilities, transferred to FDA control of prescription drug advertising
Kefauver-Harris Amendment
Negligence (giving the wrong drug or drug dose that results in the patient’s death
Misfeasance
Omission (omitting a drug dose that results in the patient’s death)
Nonfeasance
Giving correct drug via wrong route
Malfeasance