Understanding Pharmacology Essentials for Medication Safety, 3rd
Edition by M. Linda Workman & LaCharity
200 Original Practice Questions and Answers
Original review questions covering core medication safety and pharmacology topics.
FOUNDATIONS OF MEDICATION SAFETY
1. What are the 'rights' of safe medication administration, at minimum?
Answer: Right patient, right drug, right dose, right route, right time, right documentation, and right reason.
2. What are the recommended two patient identifiers used to verify patient identity before medication administration?
Answer: Full name and date of birth (never room number, which can change).
3. What is a 'high-alert medication'?
Answer: A medication that carries a heightened risk of causing significant patient harm if used in error, even though errors
may not be more frequent.
4. Name three examples of high-alert medications.
Answer: Insulin, opioids, and anticoagulants (e.g., heparin, warfarin) — also concentrated electrolytes such as potassium
chloride.
5. What is an independent double-check, and when is it used?
Answer: A safety process where a second qualified clinician independently verifies a medication, dose, and calculation before
administration, used for high-alert drugs.
6. What is the purpose of a medication reconciliation process?
Answer: To create an accurate list of all medications a patient is taking, comparing it against new orders to prevent omissions,
duplications, or interactions at transitions of care.
7. What is a 'never event' related to medication administration?
Answer: A serious, preventable error such as administering a medication to the wrong patient or via the wrong route, which
should never occur with proper safeguards.
8. What is the purpose of barcode medication administration (BCMA) technology?
Answer: To electronically verify the patient, medication, dose, and time against the order at the bedside before
administration, reducing human error.
9. What should a nurse do if unsure about a medication order's safety or clarity?
Answer: Clarify the order with the prescriber before administering; never administer a medication if the order is unclear or
seems unsafe.
10. What is the correct first action after recognizing a medication error has occurred?
Answer: Assess the patient's condition, then notify the provider and complete an incident/occurrence report per institutional
policy.
PHARMACOKINETICS & PHARMACODYNAMICS BASICS
11. What are the four phases of pharmacokinetics?
Answer: Absorption, distribution, metabolism, and excretion.
12. What is bioavailability?
Answer: The proportion of an administered drug dose that reaches systemic circulation in an active, unchanged form.
13. What is the first-pass effect, and how does it affect oral drug dosing?
Answer: Extensive hepatic metabolism of an orally absorbed drug before reaching systemic circulation, often requiring higher
oral doses than IV doses to achieve the same effect.
14. What is drug half-life?
Answer: The time required for the plasma concentration of a drug to be reduced by 50%.
, 15. Why is knowledge of a drug's half-life clinically important for medication safety?
Answer: It helps determine appropriate dosing intervals and how long it takes to reach steady-state or clear from the body,
informing safe titration and monitoring.
16. What is the therapeutic index, and why does a narrow therapeutic index increase medication safety risk?
Answer: The ratio between a drug's toxic dose and its effective dose; a narrow therapeutic index means there is a small
margin between a therapeutic and a toxic dose, requiring close monitoring.
17. What is drug-drug interaction, and why is medication reconciliation important in preventing it?
Answer: An interaction where one drug alters the effect of another; medication reconciliation helps identify and prevent
potentially harmful combinations.
18. What is the difference between a drug's onset, peak, and duration of action?
Answer: Onset is when the drug begins to take effect; peak is when the drug has its maximum effect; duration is how long the
effect lasts.
19. Why is renal and hepatic function assessed before administering many medications?
Answer: These organs are primarily responsible for drug metabolism and excretion; impairment can lead to drug
accumulation and toxicity.
20. What is a loading dose, and why is it sometimes used?
Answer: An initial higher dose given to rapidly achieve a therapeutic drug concentration, followed by smaller maintenance
doses.
HIGH-ALERT MEDICATIONS: INSULIN
21. Why is insulin classified as a high-alert medication?
Answer: Errors in insulin dosing can quickly cause severe, life-threatening hypoglycemia.
22. What safety practice is recommended when administering insulin to prevent dosing errors?
Answer: Use an independent double-check with another qualified nurse to verify the dose and insulin type before
administration.
23. What is a critical safety rule regarding insulin units and syringes?
Answer: Always use an insulin syringe (marked in units) to draw up insulin — never a standard mL syringe — and never
abbreviate 'units' as 'U' in documentation, as it can be misread as a zero.
24. What are the classic signs and symptoms of hypoglycemia the nurse must recognize promptly?
Answer: Shakiness, diaphoresis, confusion, palpitations, and hunger.
25. What is the priority nursing action for a conscious patient experiencing hypoglycemia?
Answer: Administer 15-20 grams of a fast-acting oral carbohydrate, then recheck blood glucose in 15 minutes.
26. Why is it important to know the onset, peak, and duration of different insulin types (e.g., rapid-acting vs. long-acting)?
Answer: To time meals and monitoring appropriately and to anticipate when the patient is at greatest risk for hypoglycemia.
27. What is a key safety consideration when mixing two types of insulin in one syringe?
Answer: Draw up the clear (rapid/short-acting) insulin before the cloudy (intermediate/long-acting) insulin to avoid
contaminating the clear vial.
28. What is a 'sliding scale' insulin regimen?
Answer: A dosing method where insulin doses are adjusted based on a patient's current blood glucose reading, typically for
short-term glycemic management.
29. Why should insulin vials be assessed carefully before administration?
Answer: Look-alike insulin vial labels/packaging have historically contributed to dosing errors; always verify the specific
insulin type ordered.
30. What patient teaching is essential for a patient newly prescribed insulin regarding sick days?
Answer: Never stop insulin during illness without provider guidance, monitor blood glucose more frequently, and stay
hydrated, as illness can increase insulin needs.
Edition by M. Linda Workman & LaCharity
200 Original Practice Questions and Answers
Original review questions covering core medication safety and pharmacology topics.
FOUNDATIONS OF MEDICATION SAFETY
1. What are the 'rights' of safe medication administration, at minimum?
Answer: Right patient, right drug, right dose, right route, right time, right documentation, and right reason.
2. What are the recommended two patient identifiers used to verify patient identity before medication administration?
Answer: Full name and date of birth (never room number, which can change).
3. What is a 'high-alert medication'?
Answer: A medication that carries a heightened risk of causing significant patient harm if used in error, even though errors
may not be more frequent.
4. Name three examples of high-alert medications.
Answer: Insulin, opioids, and anticoagulants (e.g., heparin, warfarin) — also concentrated electrolytes such as potassium
chloride.
5. What is an independent double-check, and when is it used?
Answer: A safety process where a second qualified clinician independently verifies a medication, dose, and calculation before
administration, used for high-alert drugs.
6. What is the purpose of a medication reconciliation process?
Answer: To create an accurate list of all medications a patient is taking, comparing it against new orders to prevent omissions,
duplications, or interactions at transitions of care.
7. What is a 'never event' related to medication administration?
Answer: A serious, preventable error such as administering a medication to the wrong patient or via the wrong route, which
should never occur with proper safeguards.
8. What is the purpose of barcode medication administration (BCMA) technology?
Answer: To electronically verify the patient, medication, dose, and time against the order at the bedside before
administration, reducing human error.
9. What should a nurse do if unsure about a medication order's safety or clarity?
Answer: Clarify the order with the prescriber before administering; never administer a medication if the order is unclear or
seems unsafe.
10. What is the correct first action after recognizing a medication error has occurred?
Answer: Assess the patient's condition, then notify the provider and complete an incident/occurrence report per institutional
policy.
PHARMACOKINETICS & PHARMACODYNAMICS BASICS
11. What are the four phases of pharmacokinetics?
Answer: Absorption, distribution, metabolism, and excretion.
12. What is bioavailability?
Answer: The proportion of an administered drug dose that reaches systemic circulation in an active, unchanged form.
13. What is the first-pass effect, and how does it affect oral drug dosing?
Answer: Extensive hepatic metabolism of an orally absorbed drug before reaching systemic circulation, often requiring higher
oral doses than IV doses to achieve the same effect.
14. What is drug half-life?
Answer: The time required for the plasma concentration of a drug to be reduced by 50%.
, 15. Why is knowledge of a drug's half-life clinically important for medication safety?
Answer: It helps determine appropriate dosing intervals and how long it takes to reach steady-state or clear from the body,
informing safe titration and monitoring.
16. What is the therapeutic index, and why does a narrow therapeutic index increase medication safety risk?
Answer: The ratio between a drug's toxic dose and its effective dose; a narrow therapeutic index means there is a small
margin between a therapeutic and a toxic dose, requiring close monitoring.
17. What is drug-drug interaction, and why is medication reconciliation important in preventing it?
Answer: An interaction where one drug alters the effect of another; medication reconciliation helps identify and prevent
potentially harmful combinations.
18. What is the difference between a drug's onset, peak, and duration of action?
Answer: Onset is when the drug begins to take effect; peak is when the drug has its maximum effect; duration is how long the
effect lasts.
19. Why is renal and hepatic function assessed before administering many medications?
Answer: These organs are primarily responsible for drug metabolism and excretion; impairment can lead to drug
accumulation and toxicity.
20. What is a loading dose, and why is it sometimes used?
Answer: An initial higher dose given to rapidly achieve a therapeutic drug concentration, followed by smaller maintenance
doses.
HIGH-ALERT MEDICATIONS: INSULIN
21. Why is insulin classified as a high-alert medication?
Answer: Errors in insulin dosing can quickly cause severe, life-threatening hypoglycemia.
22. What safety practice is recommended when administering insulin to prevent dosing errors?
Answer: Use an independent double-check with another qualified nurse to verify the dose and insulin type before
administration.
23. What is a critical safety rule regarding insulin units and syringes?
Answer: Always use an insulin syringe (marked in units) to draw up insulin — never a standard mL syringe — and never
abbreviate 'units' as 'U' in documentation, as it can be misread as a zero.
24. What are the classic signs and symptoms of hypoglycemia the nurse must recognize promptly?
Answer: Shakiness, diaphoresis, confusion, palpitations, and hunger.
25. What is the priority nursing action for a conscious patient experiencing hypoglycemia?
Answer: Administer 15-20 grams of a fast-acting oral carbohydrate, then recheck blood glucose in 15 minutes.
26. Why is it important to know the onset, peak, and duration of different insulin types (e.g., rapid-acting vs. long-acting)?
Answer: To time meals and monitoring appropriately and to anticipate when the patient is at greatest risk for hypoglycemia.
27. What is a key safety consideration when mixing two types of insulin in one syringe?
Answer: Draw up the clear (rapid/short-acting) insulin before the cloudy (intermediate/long-acting) insulin to avoid
contaminating the clear vial.
28. What is a 'sliding scale' insulin regimen?
Answer: A dosing method where insulin doses are adjusted based on a patient's current blood glucose reading, typically for
short-term glycemic management.
29. Why should insulin vials be assessed carefully before administration?
Answer: Look-alike insulin vial labels/packaging have historically contributed to dosing errors; always verify the specific
insulin type ordered.
30. What patient teaching is essential for a patient newly prescribed insulin regarding sick days?
Answer: Never stop insulin during illness without provider guidance, monitor blood glucose more frequently, and stay
hydrated, as illness can increase insulin needs.
