what is the therapeutic use of phenytoin
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Nursing Elites

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ATI Pharmacology Test Bank

1. What is the therapeutic use of Phenytoin?

Correct answer: C

Rationale: Phenytoin is primarily used to diminish seizure activity and is effective in terminating ventricular arrhythmias. It works by stabilizing neuronal membranes, reducing repetitive neuronal firing, and limiting the spread of seizure activity in the brain. While phenytoin does not have a direct role in preventing thrombus formation or extending existing thrombi, it is crucial in managing seizures and certain arrhythmias.

2. In which of the following cases is Lansoprazole not used?

Correct answer: D

Rationale: Lansoprazole is a proton pump inhibitor mainly used to treat conditions related to the stomach, such as gastritis, peptic ulcers, and Zollinger-Ellison syndrome. Thalamus hypertrophy is not a condition that Lansoprazole is indicated for; it is used for gastrointestinal issues and not neurological conditions.

3. A client has a new prescription for Ranitidine. Which of the following instructions should the nurse include?

Correct answer: C

Rationale: The correct instruction for a client prescribed Ranitidine is to take the medication at bedtime. Ranitidine is best taken at bedtime as it helps decrease the production of stomach acid during the night, providing optimal relief for conditions like heartburn or acid indigestion.

4. When providing teaching to a client with a prescription for Hydrochlorothiazide, which instruction should the nurse include?

Correct answer: D

Rationale: The correct instruction for a client prescribed Hydrochlorothiazide is to monitor for signs of dehydration. Hydrochlorothiazide is a diuretic that can lead to fluid loss and electrolyte imbalance, potentially causing dehydration. Signs of dehydration include dry mouth, increased thirst, and decreased urine output. Therefore, it is essential for the client to be vigilant in recognizing these symptoms and seek medical attention if they occur. Choices A, B, and C are incorrect. Taking Hydrochlorothiazide at bedtime is not a specific instruction related to its effects or side effects. Avoiding foods high in potassium may be necessary for some medications, but it is not the primary concern with Hydrochlorothiazide. Taking this medication on an empty stomach is not a requirement and may vary depending on individual preferences or healthcare provider instructions.

5. When teaching the parents of a child who has a new prescription for Desipramine, which of the following adverse effects should the nurse instruct the parents is the priority to report to the provider?

Correct answer: B

Rationale: The priority adverse effect to report when a child is taking Desipramine is suicidal thoughts. Desipramine can lead to an increased risk of suicidal thoughts and behaviors. The nurse should emphasize to the parents the importance of monitoring the child for any signs of worsening depression or suicidal ideation. Prompt reporting of such symptoms can help prevent harm to the child. Choices A, C, and D are not the priority adverse effects associated with Desipramine. While constipation, photophobia, and dry mouth can occur as side effects of Desipramine, they are not as critical as the risk of suicidal thoughts, which requires immediate attention to ensure the safety of the child.

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