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A nurse is preparing a teaching plan for a female client who has Bipolar disorder and a new prescription for Carbamazepine. Which of the following instructions should the nurse include in the teaching? (Select one that does not apply.)
- A. This medication can safely be taken during pregnancy.
- B. Eliminate grapefruit juice from your diet.
- C. You will need to have a complete blood count and carbamazepine levels drawn periodically.
- D. You'll your provider if you develop a rash.
Correct Answer: A
Rationale: Grapefruit juice interacts, blood counts monitor toxicity, rash signals reaction, and driving caution addresses sedation.
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Adherence is improved when a drug can be given once daily. Which of the following drugs can be given once daily?
- A. Tacrine
- B. Donepezil
- C. Memantine
- D. Pyridostigmine
Correct Answer: B
Rationale: Donepezil's long half-life allows once-daily dosing, improving adherence.
Low doses of aspirin prolong bleeding time by selectively inhibiting synthesis of the following mediator in the platelets:
- A. Thromboxane Aâ‚‚
- B. 5-Hydroxytryptamine
- C. Platelet activating factor
- D. Prostacyclin
Correct Answer: A
Rationale: Low-dose aspirin irreversibly inhibits COX-1 in platelets, reducing thromboxane Aâ‚‚ production, which promotes platelet aggregation, thus prolonging bleeding time.
Where are large fenestrations or slit junctions located?
- A. Bone
- B. Brain
- C. Skin
- D. Liver
Correct Answer: D
Rationale: The liver has large fenestrations in sinusoidal endothelium, allowing easy drug passage, unlike the brain (tight junctions) or bone/skin (less permeable).
You are caring for a patient who takes several drugs. You know that those patients most likely to have adverse drug reactions are who?
- A. Patients with coronary artery disease
- B. Non-compliant patients
- C. Patients who are on the recommended dose
- D. Very young and very old patients
Correct Answer: D
Rationale: Very young and old patients have immature or declining organ function, increasing adverse reaction risk.
A patient on a Class IV antiarrhythmic is experiencing bradycardia. Which medication is the patient most likely taking?
- A. Amiodarone
- B. Diltiazem
- C. Flecainide
- D. Lidocaine
Correct Answer: B
Rationale: Diltiazem, a Class IV calcium channel blocker, slows AV node conduction, commonly causing bradycardia.