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PHARMACOLOGY
PHARMACOLOGY - PICKETT CHAPTER 2
57
Dentistry
Undergraduate 1
05/24/2014

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Term
AFFINITY
Definition
•THE FORCE OF ATTRACTION OF A MOLECULE TO A RECEPTOR SITE
Term
AGONIST
Definition
•A DRUG THAT HAS A DIRECT STIMULATORY EFFECT ON A RECEPTOR
Term
ANTAGONIST
Definition
•A DRUG THAT INTERFERES WITH THE ACTION OF AN AGONIST
Term
CEILING DOSE
Definition
•THE DOSE ABOVE WHICH NO FURTHER BENEFICIAL DRUG EFFECT WILL OCCUR
Term
ENTERAL
Definition
•THE ADMINISTRATION OF A DRUG THROUGH THE GASTROINTESTINAL TRACT, BY MOUTH
Term
EFFICACY
Definition
•THE MAGNITUDE OF RESPONSE OBTAINED FROM OPTIMAL RECEPTOR SITE OCCUPANCY BY A DRUG
Term
HALF-LIFE
Definition
•THE TIME IT TAKES FOR HALF THE DRUG TO BE REMOVED FROM THE BODY
Term
INTRINSIC ACTIVITY
Definition
•THE ABILITY TO CAUSE AN EFFECT OR ACTION
Term
PARENTERAL
Definition
•THE ADMINISTRATION OF A DRUG BYPASSING THE GI TRACT, USUALLY THROUGH INJECTION INTO THE BODY IN VARIOUS WAYS BUT ALSO INCLUDING INHALATION AND TOPICAL
Term
PARTIAL AGONIST
Definition
•A DRUG WITH AFFINITY FOR THE RECEPTOR SITE, BUT UNABLE TO PRODUCE A STRONG EFFECT OR ACTION
Term
PHARMACODYNAMICS
Definition
•THE MECHANISMS OF DRUG ACTION INVOLVING BIOCHEMICAL AND PHYSIOLOGIC EFFECTS OF DRUGS
Term
PHARMACOKINETICS
Definition
•THE ABSORPTION, DISTRIBUTION, METABOLISM, AND EXCRETION OF A DRUG
Term
PHARMACOTHERAPEUTICS
Definition
•THE USE OF PHARMACOLOGIC AGENTS TO DIAGNOSE, TREAT, OR PREVENT DISEASE
Term
POTENCY
Definition
•THE CONCENTRATION AT WHICH THE DRUG ELICITS 50% OF ITS MAXIMAL RESPONSE, RELATED TO THE DRUG'S AFFINITY FOR THE RECEPTOR
Term
RECEPTOR SITE
Definition
•A SPECIALIZED AREA ON A CELL OR WITHIN A CELL WHERE A DRUG ACTS TO INITIATE A SERIES OF BIOCHEMICAL AND PHYSIOLOGIC EFFECTS
Term
STRONG AGONIST
Definition
•DRUG THAT PRODUCES A SIGNIFICANT PHYSIOLOGIC RESPONSE WHEN ONLY A RELATIVELY SMALL # OF RECEPTORS ARE OCCUPIED
Term
TOXICITY
Definition
•OVERDOSE, UNDESIRABLE EFFECTS, OR POISONING
Term
LIST 4 PRINCIPLES OF PHARMACOLOGY THAT THE ORAL HEALTH PROFESSIONAL MUST UNDERSTAND IN ORDER TO PROVIDE INFORMATION ON DRUG EFFECTS
Definition
•KNOWING HOW THE DRUG WORKS (MECHANISM OF ACTION)
•POSSIBLE SIDE EFFECTS
•ORAL HEALTH EDUCATION INFORMATION RELATED TO DRUG EFFECTS
•THE RISKS OF TAKING A DRUG
Term
DESCRIBE THE STEPS A DRUG FOLLOWS AFTER BEING DELIVERED TO BODY CELLS
Definition
•DELIVERY
•COMPLEX FORMATION (BINDS TO RECEPTOR)
•DRUG-RECEPTOR INTERACTION
•MECHANISM OF ACTION
Term
ABSORPTION USUALLY OCCURS IN THE _________
Definition
•SMALL INTESTINES
Term
DISTRIBUTION USUALLY OCCURS IN THE _________
Definition
•BLOOD
Term
METABOLISM USUALLY OCCURS IN THE _________
Definition
•LIVER
Term
ELIMINATION USUALY OCCURS IN THE _________
Definition
•KIDNEYS
Term
LIST 7 FEATURES OF RECEPTORS
Definition
•CELLULAR MACROMOLECULES
•LOCATION ON THE CELL SURFACE OR WITHIN THE CELL
•HUNDREDS OF DIFFERENT RECEPTORS ON A SINGLE CELL
•*COMPLEMENTARY FIT* BETWEEN DRUG AND RECEPTOR
•ELECTROCHEMICAL CHARGE
•HYDROPHILIC OR HYDROPHOBIC
•ONLY ONE DRUG MOLECULE CAN OCCUPY A RECEPTOR AT ONE TIME
Term
IONIC BONDS
Definition
•INTERACTIONS OCCURING BETWEEN ATOMS WITH OPPOSITE CHARGES (SODIUM(+) AND CHLORIDE(-))
Term
HYDROGEN BONDS
Definition
•WHEN BOUND TO NITROGEN OR OXYGEN, THE HYDROGEN ATOMS BECOME POSITIVELY POLARIZED
•WEAKER THAN IONIC BONDS
Term
COVALENT BONDS
Definition
•STRONGEST TYPE OF BOND BETWEEN A DRUG AND A RECEPTOR
•SHARING OF ELECTRONS BY 2 ATOMS
•EX: TETRACYCLINE AND DENTIN
•BOND IS OFTEN IRREVERSIBLE
•NOT COMMON
Term
VAN DER WAALS FORCES
Definition
•WEAK ATTRACTIVE FORCE BETWEEN SOME DRUGS AND THEIR RECEPTORS
Term
AFFINITY/INTRINSIC- WHICH ONE IS RELATED TO POTENCY?
Definition
•AFFINITY
Term
WHICH TYPES OF BONDS ARE THE MOST COMMON BETWEEN DRUGS AND RECEPTORS?
Definition
•IONIC AND HYDROGEN
Term
WHAT IS THE DIFFERENCE IN THE EFFECT OF A WEAK AGONIST WHEN COMPARED TO A PARTIAL AGONIST?
Definition
•A WEAK AGONIST IS MORE POTENT THAN A PARTIAL AGONIST
Term
WHAT IS THE RELATIONSHIP OF EFFICACY AND THE CEILING DOSE?
Definition
•EFFICACY IS THE MAXIMUM RESPONSE PRODUCED BY A DRUG, THEREFORE ANY ADDITIONAL DOSES WOULD PRODUCE NO FURTHER BENEFICIAL EFFECT - KNOWN AS CEILING DOSE
Term
THRESHOLD DOSE
Definition
•THE LOWEST DOSE OF A DRUG THAT WILL PRODUCE A MEASURABLE RESPONSE
Term
ED50
Definition
•MEDIAN EFFECTIVE DOSE
•DOSE OF A DRUG THAT IS ABLE TO PRODUCE A DESIRED RESPONSE IN 50% OF THE INDIVIDUALS WITHIN THE SAME POPULATION
Term
LD50
Definition
•MEDIAN LETHAL DOSE (LAB ANIMALS ARE USED TO DETERMINE THIS)
•DEATH IS MEASURED AT THE ENDPOINT
Term
TD50
Definition
•MEDIAN TOXIC DOSE
Term
THERAPEUTIC INDEX
Definition
•TI
•MEASURES THE MARGIN SAFETY OF A DRUG
•IT IS THE RATIO OF LD50/ED50
•THE HIGHER THE NUMERICAL VALUE OF THE RATION, THE SAFER THE DRUG
Term
FEATURES OF IONIZED MOLECULES
Definition
•MORE WATER SOLUBLE
Term
FEATURES OF NON-IONIZED MOLECULES
Definition
•MORE LIPID SOLUBLE
•WILL DIFFUSED ACROSS BIOLOGIC MEMBRANES MORE READILY THAN ITS POLAR, IONIZED FORM
Term
WHAT IS THE ROLE OF SPECIALIZED TRANSPORT MECHANISMS IN MOVING DRUG MOLECULES ACROSS THE MEMBRANE? WHAT ARE SOME EXAMPLES OF A SPECIALIZED TRANSPORT VEHICLE?
Definition
•ROLE: TO MOVE LARGER MOLECULES (IONIZED, WATER-SOLUBLE)
•EX: MOVEMENT OF GLUCOSE ACROSS CELL MEMBRANES
•EX: FAT-SOLUBLE VITAMINS (A,D,E,K)
Term
WHAT ARE SOME FACTORS THAT AFFECT ABSORPTION OF A DRUG?
Definition
•ROUTE OF ADMINISTRATION
•DEGREE OF IONIZATION AND PH OF TISSUES
•FORMATION OF DRUG (LIQUID OR SOLID)
•CONCENTRATION (THE GREATER, THE FASTER IT ABSORBS)
•CIRCULATION TO THAT AREA (THE GREATER THE BLOOD FLOW, THE FASTER THE ABSORPTION)
•AREA OF ABSORPTIVE SURFACE (THE GREATER THE AREA, THE FASTER THE ABSORPTION)
Term
FROM WHERE IN THE GI TRACT ARE MOT DRUGS ABSORBED?
Definition
•UPPER SMALL INTESTINE
Term
FEATURES OF ENTERAL ROA
Definition
•ORAL ROUTE
•SAFEST, MOST COMMON
•MOST CONVENIENT
•MOST ECONOMICAL
Term
FEATURES OF PARENTERAL ROA
Definition
•BYPASS THE GI TRACT
•INCLUDES VARIOUS ROUTES:
-INJECTION (SUBCUTANEOUS, INTRAMUSCULAR)
-INHALATION
-TOPICAL
Term
HOW DOES THE FIRST-PASS EFFECT INFLUENCE THE ONSET OF DRUG ACTION?
Definition
•IT REDUCES THE BIOAVAILABLITY OF SOME DRUGS
Term
WHICH PARENTERAL ROUTE IS USED IN MOST EMERGENCY SITUATIONS?
Definition
•INTRAVENOUS
Term
WHICH IS THE MOST PREDICTABLE ROA?
Definition
•INTRAVENOUS
Term
HOW DOES FOOD IN THE STOMACH AFFECT DRUG ABSORPTION?
Definition
•FOOD SLOWS THE RATE OF ABSORPTION BECAUSE THE DRUG COMPETES FOR ABSORPTION WITH FOOD COMPONENTS IN THE GI MUCOSA
Term
WHAT ARE THE PRECAUTIONS TO FOLLOW WHEN USING TOPICAL AGENTS?
Definition
•LIMIT THE AREA OF APPLICATION
•AVOID PLACEMENT OF AN OCCLUSIVE DRESSING
•AVOID APPLYING ON ABRADED AREAS
•CONSIDER ALLERGIC POTENTIAL
Term
DESCRIBE FEATURES OF DISTRIBUTION THAT AFFECT A DRUG MOLECULE REACHING THE RECEPTOR
Definition
•MOLECULAR WEIGHT
•CONCENTRATION IN PLASMA
•LIPID SOLUBILITY
•pH OF THE VASCULAR COMARTMENT
•pKa OF THE DRUG
Term
WHAT IS THE ROLE OF ALBUMIN IN THE BLOOD?
Definition
•IT'S A PLASMA PROTEIN THAT PREVENTS DRUGS FROM LEAVING THE VASCULAR COMPARTMENT, TO A CERTAIN EXTENT, BY BINDING THEM
Term
WHAT ORGAN IS RESPONSIBLE FOR MOST DRUG METABOLISM?
Definition
•LIVER
Term
DESCRIBE 4 WAYS DRUGS ARE ALTERED DURING BIOTRANSFORMATION
Definition
•CONVERT AN ACTIVE DRUG TO AN INACTIVE DRUG
•CONVERT AN ACTIVE DRUG TO AN ACTIVE OR TOXIC METABOLITE
•CONVERT AN INACTIVE DRUG TO AN ACTIVE DRUG
•CONVERT AN UNEXCRETABLE (MORE LIPOPHILIC) DRUG INTO AN EXCRETABLE (MORE HYDROPHILIC) METABOLITE
Term
WHAT ARE THE DIFFERENCES BETWEEN PHASE I REACTIONS AND PHASE II REACTIONS IN BIOTRANSFORMATION?
Definition
•IN CONTRAST TO A PHASE I REACTION, PHASE II BIOTRANSFORMATION ALMOST ALWAYS RESULTS IN INACTIVATION OF THE PARENT DRUG.
•ALL PHASE II METABOLITES ARE PHARMACOLOGICALLY INACTIVE
Term
WHICH ENZYME SYSTEM IS THE PRIMARY PATHWAY FOR DRUG METABOLISM?
Definition
•CYTOCHROME P450
Term
IN WHICH ORGAN ARE MOST DRUGS EXCRETED?
WHAT IS THE PRIMARY AREA OF THE ORGAN WHERE THIS OCCURS?
Definition
•KIDNEYS
•THE GLOMERULUS
Term
DESCRIBE THE PROCESS OF DRUG EXCRETION
Definition
•DRUG MOLECULES ARE REMOVED FROM THE CIRCULATION INTO RENAL PROXIMAL TUBULES BY THE GLOMERULI, OR THEY MAY BE SECRETED INTO RENAL PROXIMAL FROM PERITUBULAR CAPILLARIES AND IF NOT REABSORBED IN THE COLLECTING TUBULES OF THE KIDNEYS, EXCRETD IN THE URINE
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