Fundamentals Exam Questions and Answers
1. Pharmacokinetics: The process by which drugs are absorbed, distributed within the body,
metabolized, and excreted.
2. Pharmacodynamics: The study of what the drug does to the body
3. Factors Affecting Drug Absorption: Rate of
dissolution Surface area
Blood flow
Lipid
solubility pH
partitioning
4. Factors Affecting Drug Distribution: Blood flow
to tissues Ability to exit the vascular system
Blood-brain barrier
Protein-binding
capacity
5. Xenobiotics: substances that are foreign to the body, usually synthetic chemical compounds;
medications are a common example
,6. Cytochrome P450 (CYP450): xenobiotic-metabolizing enzymes necessary for the
production of choles- terol and steroids and the detoxification of chemicals and drug metabolism.
7. Function of Cytochrome P450 (CYP450): responsible for phase 1 metabolism in
which drugs are oxidized, reduced, or hydrolyzed
8. Phase 1 Metabolism of Drugs via P450: Oxidation; Reduction; Hydrolysis
9. Three possible outcomes of phase 1 drug metabolism.: -Drug
becomes completely inactive
-Drug becomes partially inactive but one or more metabolites remain active
-Original drug is not pharmacologically active but one metabolite remains active
10. CYP450 Inducers: Medications that can increase the rate of another drug's metabolism
by elevating CYP450 enzyme activity via increasing enzyme synthesis. decreasing the concentration
of the "parent drug"
11. CYP450 Inducer Medications:
CRAPGPS Carbamazepine
Rifampin
Alcohol
Phenytoin
Griseofulvin
Phenobarbita
,l
Sulfonylureas
12. CYP450 Inhibitors: Medications that inhibit the metabolic activity of one or more of the
CYP450 enzymes. Higher risk for toxicity; prolongs the pharmacological ettect of the "parent drug".
13. CYP450 Inhibitor Medications:
VISACKGQ Valproate
Isoniazid
Sulfonamides
Amiodarone
Chloramphenicol
Ketoconazole
Grapefruit Juice
Quinidine
14. Beers Criteria: -potentially Inappropriate Medication (PIM) use in older adults
-potentially Inappropriate Medication (PIM) use in older adults due to medication-disease or medication-
syndrome interactions that may exacerbate the disease or syndrome
-medications to be used cautiously in older adults
-clinically significant drug interactions that should be avoided in older adults
-medications to be avoided or dosage decreased in the presence of impaired kidney function in older adults
15. Pharmacokinetic Interactions: when one medication systemically alters the
potency of another medication.
, 16. Absorption Interaction: result of a change due to one medication's ettect on another
medication's route of entry into the body.
17. Distribution Interaction: caused by the amount of unbound/free medications
available at the various target sites.
18. Metabolism Interaction: concentration of the medication after biotransformation into
active and inac- tive metabolites in higher or lower than expected.
19. Elimination Interaction: the body's ability to eliminate medications in pure form
or by altering a metabolite from the body.
20. Pharmacodynamic Interactions: does not alter or impact absorption,
distribution, metabolism, or elimination because of the one medication's ability to manipulate the
ettect of another medication at its site of action