CH. 1 Introduction to Pharmacology Flashcards
Pharmacodynamics
Study of the action of drugs on living tissue
Pharmacokinetics
Study of the processes of drug absorption, distribution, metabolism and excretions
Pharmacotherapeutics
Study of the use of drugs in treating disease
Pharmacy
Science of preparing and dispensing medicines
Posology
Study of the amount of drug that is required to produce therapeutic effects
Toxicology
Study of the harmful effects of drug use on living tissue
Therapeutic effect
Desired, or intended drug effect to alleviate some condition or symptom of disease
Drug indication
Intention or indicated uses for any drug
Contraindications
Conditions or situations in which a certain drug should not be administered
Side effects
Drug effect other than the therapeutic effect that is usually undesirable but not harmful
Adverse effects
Undesirable and potentially harmful drug effect
Toxic effects
Undesirable drug effect that implies drug poisoning; can be very harmful or life threatening
Site of action
Location within the body where the drug exerts its therapeutic effect
Mechanism of action
Explains how a drug produces its effects
Receptor Site
specific location on certain cells for certain drugs and normal body substances
Agonists
Drugs that bind to specific receptors and produce a drug action
Antagonists
Drugs that bind to specific receptors and block agonist drug action or cellular functions are called antagonists
Competitive antagonism
When both agonist and antagonist drugs bind to the same receptor and are administered together, they compete with each other for the same receptor site.
Graded dose-response curve
Used to evaluate drug response among different drugs. eX. ED50
Potency
Measure of the strength, or concentration, of a drug required to produce a specific effect
Quantal dose response curve
shows the percentage of a human or animal population that responds to a specific drug dosage.
Duration of action
Length of time that a drug continues to produce its effect
Onset of action
The time from drug administration to the first observable effect
Time -plasma drug concentration curve
Used for predicting the frequency with which a drug must be administered in order to maintain an effective drug response
Therapeutic index
A ratio of the LD50 to ED50 of a drug. The equation is expressed as TI=LD50/ED50 =1000mg/100mg =10
Adverse Drug Effects
Drugs that produce birth defects, such as thalidomide, are known as teratogens.
Idiosyncrasy
Determined by individual variation in certain enzymes or other body proteins which cause an unusual or unexpected drug response
Drug allergy
Occurs when an individual becomes sensitized to a particular drug which acts as an antigen and produces antibodies against the drug
Chemical name
Name that defines the chemical composition of a drug
Generic name
Nonproprietory name of a drug
Trade name
Patented proprietary name of a drug sold by a specific drug manufacturer; also referred to as the brand name
Prescription
Requires a written or phone order which can only be issued by or under the direction of a licensed physician, dentist, or veterinarian.
Nonprescription
referred to as OTC drugs can be purchased without the services of a physician or pharmacist
Controlled substance
Substance that has the potential for abuse and thus is regulated by law
Schedule___drugs such as morphine, have a high abuse potential and an accepted medical use
II
Schedule__drugs have a high abuse potential, no accepted medical use
I
Schedule ___prescriptions can not be refilled; a new written prescription from the physician is required
II
Which of the following defines a schedule IV drug?
Low abuse potential and accepted medical use
Schedule___drugs have a moderate abuse potential and accepted medical use
III
What two things does a drug manufacturer have to show before a drug is approved by the FDA?
Safety and efficacy
Schedule __drugs have a high abuse potential and no medical use
I
Situation or condition in which a certain drug should not be administered
Contraindication
Maximal response that will be reached and doses above those needed to reach this effect can cause undesired effects
Ceiling effect
Proprietary name of a drug
Brand name or Trade name
Explains how a drug produces its effects
Mechanism
Anti-diarrheal medications i.e. diphenoxylate and atropine
Preparations containing small or limited quantities of codeine
Schedule V
Implies drug poisoning, the consequences can be extremely harmful and/or life threatening
toxic effect
antagonism refers to both agonist and antagonist drugs being administered together and competing for the same receptor sites
Competitive
Phenobarbital ,valium, Ambien
Schedule IV drugs
In general terms, how do drugs work?
They influence the functions of cells