Nokea
An agonist is substance that:
- A. Interacts with the receptor without producing any effect
- B. Interacts with the receptor and initiates changes in cell function, producing various effects
- C. Increases concentration of another substance to produce effect
- D. Interacts with plasma proteins and doesn't produce any effect
Correct Answer: B
Rationale: An agonist binds receptors and activates them, producing a biological effect.
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A physician has ordered intramuscular injections of morphine, a narcotic, every 4 hours as needed for pain for a motor vehicle accident victim. The nurse is aware that there is a high abuse potential for this drug, therefore, morphine is categorized as a:
- A. Schedule I drug
- B. Schedule II drug
- C. Schedule III drug
- D. Schedule IV drug
Correct Answer: B
Rationale: Narcotics such as morphine are considered schedule II drugs because of the high abuse potential with severe dependence liability. Schedule I drugs have high abuse potential and no accepted medical use. Schedule III drugs have a lesser abuse potential than schedule II drugs and an accepted medical use. Schedule IV drugs have low abuse potential and limited dependence liability.
The nurse is caring for a patient who takes several drugs. What patient would the nurse monitor most closely because of an increased risk for adverse effects of medications?
- A. The school-aged child
- B. The obese middle-aged man
- C. The adolescent
- D. The newborn infant
Correct Answer: D
Rationale: Newborns have immature organs, increasing risk for adverse effects from multiple drugs.
A nurse is preparing to administer a medication to a client who has absence seizures. The nurse should anticipate administering which of the following medications?
- A. Phenytoin
- B. Ethosuximide
- C. Gabapentin
- D. Carbamazepine
Correct Answer: B
Rationale: Ethosuximide , valproic acid , and lamotrigine are effective for absence seizures.
A patient needs 500 mL of an infusion over 5 hours. The drop factor is 10 gtt/mL. Calculate the flow rate in drops per minute.
- A. 16.67 gtt/min
- B. 20 gtt/min
- C. 25 gtt/min
- D. 50 gtt/min
Correct Answer: B
Rationale: Flow rate = (500 mL 10 gtt/mL) ÷ (5 60) = 5,000 ÷ 300 = 16.67 gtt/min, rounded to 20 gtt/min.
Which classification does meperidine (Demerol) fall under?
- A. I
- B. II
- C. III
- D. IV
Correct Answer: B
Rationale: Meperidine (Demerol) is a Schedule II drug; it has a high potential for abuse and may lead to severe psychological and physical dependence.