NUR 3420 Pharmacology PrepU
Chapter 9 Questions and Answers
2026 Updated.
The nurse explains to a client that angina can be caused by a thrombus forming in which
anatomical location? - Answer the heart
Explanation:
In coronary arteries, a thrombus may precipitate myocardial ischemia (angina or infarction).
Assessment would focus on the coronary system, rather than any of the other presented
options.
Warfarin typically takes 3 days to achieve its onset of action. - Answer True
Evaluation:
Warfarin's onset of action is about 3 days; its effects last for 4 to 5 days.
A client is to receive enoxaparin (Lovenox). The nurse would administer this drug by which
route? - Answer Subcutaneous injection
Explanation:
Enoxaparin (Lovenox) is administered via subcutaneous injection. Intramuscular (IM)
administration is avoided because of the possibility of the development of local irritation, pain,
or hematoma (a collection of blood in the tissue). Intravenous infusions are used with several
anticoagulants such as heparin. Warfarin is given orally.
A nurse is preparing to discharge a female client newly prescribed warfarin (Coumadin). While
assessing the client's knowledge of their drug, what would indicate that the client needs further
instruction concerning her drug therapy? - Answer "I take aspirin for my arthritis."
Explanation:
Increased bleeding can occur if a salicylate is taken in combination with warfarin. The nurse will
instruct the client that she will have to stop taking aspirin. Walking, eating tomatoes, and
drinking an occasional glass of wine should not interfere with the therapeutic effects of
warfarin.
A nurse is caring for a client who is going home on warfarin (Coumadin). The nurse will schedule
the client for what laboratory test to help evaluate therapeutic effects of the drug? - Answer
Prothrombin time (PT) and international normalized ratio (INR)
, Explanation:
Evaluate for therapeutic effects of warfarin—prothrombin time (PT) 1.5 to 2.5 times the control
value or ratio of PT to INR (international normalized ratio) of 2 to 3—to evaluate the
effectiveness of the drug dose.
The nurse knows that teaching about warfarin (Coumadin) is successful if the client states: -
Answer "I will ask my health care provider about herbal supplements."
Explanation:
Many commonly used herbs and supplements have a profound effect on drugs used for
anticoagulation. The other options indicate the client needs more teaching.
A 73-year-old client receiving warfarin (Coumadin) has blood in the urinary drainage bag this
morning. After reporting these observations to the health care provider, the nurse will expect to
administer what substance? - Answer Vitamin K
Explanation:
Vitamin K is the antidote for warfarin.
When a client is a receiving a continuous intravenous infusion of heparin 1,000 U/hr, what
should the nurse do? - Answer Avoid IM injections
Explanation:
The most commonly encountered adverse effect of the anticoagulants is bleeding, ranging from
bleeding gums with tooth brushing to severe internal hemorrhage. Avoid all invasive
procedures, including giving IM injections while the client is on heparin. It would not be
necessary to assess for respiratory depression, measure hourly output, or monitor the BP
hourly.
A nurse will use extreme caution when administering heparin to which patient? - Answer A
38-year-old male with peptic ulcer disease
Explanation:
Heparin should be administered with extreme caution to patients with peptic ulcer or liver
disease or after surgery because those patients would have greater risk for hemorrhage or
excessive blood loss. Urticaria is a listed adverse effect of taking heparin and would therefore be
expected. A patient who takes heparin would be advised to not drink heavily or smoke, but
neither would have the safety risk posed by a patient with peptic ulcer. A patient with an
accelerated heart rate and on heparin therapy would be at no special risk.
Chapter 9 Questions and Answers
2026 Updated.
The nurse explains to a client that angina can be caused by a thrombus forming in which
anatomical location? - Answer the heart
Explanation:
In coronary arteries, a thrombus may precipitate myocardial ischemia (angina or infarction).
Assessment would focus on the coronary system, rather than any of the other presented
options.
Warfarin typically takes 3 days to achieve its onset of action. - Answer True
Evaluation:
Warfarin's onset of action is about 3 days; its effects last for 4 to 5 days.
A client is to receive enoxaparin (Lovenox). The nurse would administer this drug by which
route? - Answer Subcutaneous injection
Explanation:
Enoxaparin (Lovenox) is administered via subcutaneous injection. Intramuscular (IM)
administration is avoided because of the possibility of the development of local irritation, pain,
or hematoma (a collection of blood in the tissue). Intravenous infusions are used with several
anticoagulants such as heparin. Warfarin is given orally.
A nurse is preparing to discharge a female client newly prescribed warfarin (Coumadin). While
assessing the client's knowledge of their drug, what would indicate that the client needs further
instruction concerning her drug therapy? - Answer "I take aspirin for my arthritis."
Explanation:
Increased bleeding can occur if a salicylate is taken in combination with warfarin. The nurse will
instruct the client that she will have to stop taking aspirin. Walking, eating tomatoes, and
drinking an occasional glass of wine should not interfere with the therapeutic effects of
warfarin.
A nurse is caring for a client who is going home on warfarin (Coumadin). The nurse will schedule
the client for what laboratory test to help evaluate therapeutic effects of the drug? - Answer
Prothrombin time (PT) and international normalized ratio (INR)
, Explanation:
Evaluate for therapeutic effects of warfarin—prothrombin time (PT) 1.5 to 2.5 times the control
value or ratio of PT to INR (international normalized ratio) of 2 to 3—to evaluate the
effectiveness of the drug dose.
The nurse knows that teaching about warfarin (Coumadin) is successful if the client states: -
Answer "I will ask my health care provider about herbal supplements."
Explanation:
Many commonly used herbs and supplements have a profound effect on drugs used for
anticoagulation. The other options indicate the client needs more teaching.
A 73-year-old client receiving warfarin (Coumadin) has blood in the urinary drainage bag this
morning. After reporting these observations to the health care provider, the nurse will expect to
administer what substance? - Answer Vitamin K
Explanation:
Vitamin K is the antidote for warfarin.
When a client is a receiving a continuous intravenous infusion of heparin 1,000 U/hr, what
should the nurse do? - Answer Avoid IM injections
Explanation:
The most commonly encountered adverse effect of the anticoagulants is bleeding, ranging from
bleeding gums with tooth brushing to severe internal hemorrhage. Avoid all invasive
procedures, including giving IM injections while the client is on heparin. It would not be
necessary to assess for respiratory depression, measure hourly output, or monitor the BP
hourly.
A nurse will use extreme caution when administering heparin to which patient? - Answer A
38-year-old male with peptic ulcer disease
Explanation:
Heparin should be administered with extreme caution to patients with peptic ulcer or liver
disease or after surgery because those patients would have greater risk for hemorrhage or
excessive blood loss. Urticaria is a listed adverse effect of taking heparin and would therefore be
expected. A patient who takes heparin would be advised to not drink heavily or smoke, but
neither would have the safety risk posed by a patient with peptic ulcer. A patient with an
accelerated heart rate and on heparin therapy would be at no special risk.
