ATI RN
ATI Pharmacology Proctored
1. Which of the following is the antidote for lead poisoning?
- A. Naloxone
- B. Nitrite
- C. CaEDTA
- D. Dialysis
Correct answer: C
Rationale: Calcium disodium ethylenediaminetetraacetic acid (CaEDTA) is the antidote for lead poisoning. CaEDTA works by chelating lead, forming a complex that is then excreted in the urine. It is used in chelation therapy to treat lead poisoning by reducing lead levels in the body.
2. A healthcare provider is assessing a client who is taking levothyroxine. The healthcare provider should recognize that which of the following findings is a manifestation of levothyroxine overdose?
- A. Insomnia
- B. Constipation
- C. Drowsiness
- D. Hypoactive deep-tendon reflexes
Correct answer: A
Rationale: Insomnia is a common symptom of levothyroxine overdose due to excessive stimulation of the central nervous system. Levothyroxine is a thyroid hormone replacement medication, and an overdose can lead to hyperthyroidism symptoms, including insomnia. Constipation and drowsiness are not typically associated with levothyroxine overdose. Hypoactive deep-tendon reflexes are more indicative of hypothyroidism rather than an overdose of levothyroxine.
3. Which of the following is classified as a class IA Sodium Channel blocker?
- A. Quinidine
- B. Disopyramide
- C. Aminodarone
- D. Propafenone
Correct answer: A
Rationale: Quinidine is classified as a class IA sodium channel blocker. Class IA antiarrhythmics, like quinidine, work by blocking sodium channels and delaying repolarization. Propafenone, mentioned in the original rationale, is actually a class IC antiarrhythmic agent, not a class IA sodium channel blocker.
4. Which of the following is considered a class IA Sodium Channel blocker?
- A. Mexiletine
- B. Amiodarone
- C. Quinidine
- D. Procainamide
Correct answer: D
Rationale: Procainamide is a class IA antiarrhythmic drug that acts as a sodium channel blocker by blocking fast sodium channels. Mexiletine is a class IB antiarrhythmic drug, not class IA. Amiodarone is a class III antiarrhythmic, and Quinidine is a class IA antiarrhythmic but not a sodium channel blocker.
5. Which of the following conditions is not treated with Nifedipine?
- A. Angina
- B. Arrhythmias
- C. Hypertension
- D. Fluid retention
Correct answer: D
Rationale: Nifedipine is a calcium channel blocker primarily used in the management of angina and hypertension. It is not typically used to treat arrhythmias or fluid retention. Angina is chest pain caused by reduced blood flow to the heart, and hypertension is high blood pressure. Therefore, fluid retention is the condition that is not treated with Nifedipine.
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