ATI Pharmacology Exam 1 Study Guide: Medication Safety 2026
|Rationales
1. A nurse is preparing to administer a medication to a patient. Which of the
following is the most reliable method for identifying the patient?
A. Compare the patient’s name and date of birth on their ID band with the MAR.
B. Check the patient’s room number against the MAR.
C. Ask the patient’s roommate to identify them.
D. Call the patient by their first name and see if they respond.
Answer: A
Rationale: To ensure patient safety, use at least two patient identifiers, such as name and
date of birth, and compare them directly with the Medication Administration Record
(MAR).
2. A nurse is reviewing a medication order that is written as ‘MS 2mg IV push.’
What is the most appropriate action for the nurse to take?
A. Administer 2mg of Morphine Sulfate.
B. Call the provider to clarify the order.
C. Administer 2mg of Magnesium Sulfate.
D. Ask another nurse what they think the order means.
Answer: B
Rationale: ‘MS’ is a prohibited abbreviation because it can stand for Morphine Sulfate or
Magnesium Sulfate. The nurse must clarify the order with the prescribing provider.
,3. Which of the following describes the ‘First-Pass Effect’?
A. The time it takes for a drug to reach its maximum therapeutic effect.
B. The inactivation of a drug by the liver after oral administration before it reaches systemic circulation.
C. The excretion of a drug through the kidneys on the first cycle of blood flow.
D. The immediate absorption of a drug through the IV route.
Answer: B
Rationale: Oral medications are absorbed from the GI tract and pass through the liver via
the portal vein, where they may be partially metabolized (inactivated) before reaching the
rest of the body.
4. A nurse is teaching a client about a new prescription for an enteric-coated
medication. Which statement by the client indicates understanding?
A. I can crush the pill and mix it with applesauce.
B. I should cut the tablet in half to make it easier to swallow.
C. I can dissolve the tablet in a glass of water.
D. I should swallow the tablet whole and not chew it.
Answer: D
Rationale: Enteric-coated medications are designed to dissolve in the small intestine to
protect the stomach lining. Crushing, chewing, or cutting them destroys this coating.
5. What is the primary site for drug metabolism in the human body?
A. Kidneys
B. Small Intestine
C. Liver
D. Lungs
Answer: C
Rationale: The liver is the primary organ responsible for the metabolism of drugs,
primarily through the cytochrome P450 enzyme system.
, 6. A drug with a high therapeutic index (TI) is considered:
A. Difficult to absorb.
B. Highly toxic.
C. Likely to cause addiction.
D. Relatively safe.
Answer: D
Rationale: A high therapeutic index means there is a large margin between the effective
dose and the lethal/toxic dose, making the drug safer.
7. A nurse receives a telephone order from a provider. Which action is necessary
to ensure safety?
A. Write the order down and sign the provider’s name.
B. Ask the provider to come to the unit immediately to sign it.
C. Wait until the next shift to enter the order.
D. Read the order back to the provider for confirmation.
Answer: D
Rationale: For verbal or telephone orders, the nurse must ‘Read Back’ the order to the
provider to verify accuracy and prevent errors.
8. Which ‘Right’ of medication administration is being followed when the nurse
checks the expiration date of a medication?
A. Right Route
B. Right Time
C. Right Documentation
D. Right Medication
Answer: D
Rationale: Checking the label and expiration date is part of ensuring the ‘Right Medication’
is given.
|Rationales
1. A nurse is preparing to administer a medication to a patient. Which of the
following is the most reliable method for identifying the patient?
A. Compare the patient’s name and date of birth on their ID band with the MAR.
B. Check the patient’s room number against the MAR.
C. Ask the patient’s roommate to identify them.
D. Call the patient by their first name and see if they respond.
Answer: A
Rationale: To ensure patient safety, use at least two patient identifiers, such as name and
date of birth, and compare them directly with the Medication Administration Record
(MAR).
2. A nurse is reviewing a medication order that is written as ‘MS 2mg IV push.’
What is the most appropriate action for the nurse to take?
A. Administer 2mg of Morphine Sulfate.
B. Call the provider to clarify the order.
C. Administer 2mg of Magnesium Sulfate.
D. Ask another nurse what they think the order means.
Answer: B
Rationale: ‘MS’ is a prohibited abbreviation because it can stand for Morphine Sulfate or
Magnesium Sulfate. The nurse must clarify the order with the prescribing provider.
,3. Which of the following describes the ‘First-Pass Effect’?
A. The time it takes for a drug to reach its maximum therapeutic effect.
B. The inactivation of a drug by the liver after oral administration before it reaches systemic circulation.
C. The excretion of a drug through the kidneys on the first cycle of blood flow.
D. The immediate absorption of a drug through the IV route.
Answer: B
Rationale: Oral medications are absorbed from the GI tract and pass through the liver via
the portal vein, where they may be partially metabolized (inactivated) before reaching the
rest of the body.
4. A nurse is teaching a client about a new prescription for an enteric-coated
medication. Which statement by the client indicates understanding?
A. I can crush the pill and mix it with applesauce.
B. I should cut the tablet in half to make it easier to swallow.
C. I can dissolve the tablet in a glass of water.
D. I should swallow the tablet whole and not chew it.
Answer: D
Rationale: Enteric-coated medications are designed to dissolve in the small intestine to
protect the stomach lining. Crushing, chewing, or cutting them destroys this coating.
5. What is the primary site for drug metabolism in the human body?
A. Kidneys
B. Small Intestine
C. Liver
D. Lungs
Answer: C
Rationale: The liver is the primary organ responsible for the metabolism of drugs,
primarily through the cytochrome P450 enzyme system.
, 6. A drug with a high therapeutic index (TI) is considered:
A. Difficult to absorb.
B. Highly toxic.
C. Likely to cause addiction.
D. Relatively safe.
Answer: D
Rationale: A high therapeutic index means there is a large margin between the effective
dose and the lethal/toxic dose, making the drug safer.
7. A nurse receives a telephone order from a provider. Which action is necessary
to ensure safety?
A. Write the order down and sign the provider’s name.
B. Ask the provider to come to the unit immediately to sign it.
C. Wait until the next shift to enter the order.
D. Read the order back to the provider for confirmation.
Answer: D
Rationale: For verbal or telephone orders, the nurse must ‘Read Back’ the order to the
provider to verify accuracy and prevent errors.
8. Which ‘Right’ of medication administration is being followed when the nurse
checks the expiration date of a medication?
A. Right Route
B. Right Time
C. Right Documentation
D. Right Medication
Answer: D
Rationale: Checking the label and expiration date is part of ensuring the ‘Right Medication’
is given.
