what is the therapeutic action of phenytoin
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Nursing Elites

ATI RN

ATI Pharmacology Proctored Exam 2024

1. What is the therapeutic action of Phenytoin?

Correct answer: B

Rationale: Phenytoin is primarily used as an anticonvulsant to prevent and control seizures. It works by stabilizing electrical activity in the brain, making it effective in managing conditions like epilepsy. Antidiabetic medications are used to regulate blood sugar levels, mood stabilizers help manage mood disorders, and antianxiety agents are used to reduce anxiety symptoms, none of which are the primary therapeutic action of Phenytoin.

2. A healthcare professional is educating a client who has a new prescription for Vitamin B12 injections. Which of the following statements should the healthcare professional include?

Correct answer: B

Rationale: The correct answer is B: 'You will need to take this medication for the rest of your life.' Clients with conditions like pernicious anemia or other causes of vitamin B12 deficiency may require lifelong cyanocobalamin supplementation to prevent deficiency. This is because their bodies are unable to absorb B12 from dietary sources adequately, necessitating ongoing injections to maintain optimal B12 levels. Choices A, C, and D are incorrect. A full glass of water is not necessary for Vitamin B12 injections. Metallic taste in the mouth is not a common side effect of Vitamin B12 injections, and there is no need to avoid consuming dairy products specifically in relation to Vitamin B12 injections.

3. A client has a new prescription for Clonidine to assist with maintenance of abstinence from opioids. The nurse should instruct the client to monitor for which of the following adverse effects?

Correct answer: B

Rationale: Dry mouth is a common adverse effect associated with Clonidine use. Clonidine is known to cause a reduction in saliva production, leading to dry mouth. Monitoring for this adverse effect is essential to ensure client comfort and compliance with the medication. Diarrhea is not a common adverse effect of Clonidine. Insomnia is more commonly associated with opioid withdrawal rather than Clonidine use. While Clonidine is used to treat hypertension, it is not typically an adverse effect of the medication.

4. A healthcare professional is preparing to administer clindamycin 200 mg by intermittent IV bolus. The amount available is clindamycin injection 200 mg in 100 mL 0.9% sodium chloride (0.9% NaCl) to infuse over 30 min. The healthcare professional should set the IV pump to deliver how many mL/hr?

Correct answer: A

Rationale: To calculate the flow rate in mL/hr: (Volume in mL / Time in hours) = Flow rate in mL/hr. In this case, (100 mL / 0.5 hr) = 200 mL/hr. The correct calculation is: 100 mL (volume) / 0.5 hr (time) = 200 mL/hr. Therefore, the correct answer is 200 mL/hr. Choice B (150 mL/hr), C (100 mL/hr), and D (250 mL/hr) are incorrect as they do not match the calculated flow rate needed for the administration of clindamycin.

5. A healthcare professional is preparing to administer an IV antibiotic to a client who has a systemic infection. Which of the following actions should the professional take first?

Correct answer: C

Rationale: The first action the healthcare professional should take is to check the client's allergy history before administering the antibiotic to prevent a potential allergic reaction. It is crucial to identify any known allergies to antibiotics to ensure the client's safety and well-being. Administering an antihistamine prior to the antibiotic (Choice A) is not recommended unless an allergic reaction occurs. Monitoring the client's urine output (Choice B) and assessing the client's vital signs (Choice D) are important but not the first step in this situation. Checking the client's allergy history takes precedence to prevent adverse reactions.

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