Correct Answer: B

Rationale: The correct answer is B. The nurse should educate the client that Omeprazole works by reducing the production of gastric acid through inhibiting the enzyme responsible for its production. This action helps in managing heartburn and related symptoms effectively. Choice A is incorrect because Omeprazole is usually taken before eating. Choice C is incorrect as Omeprazole is typically taken before a meal. Choice D is unrelated to Omeprazole, as it is not associated with causing hyperkalemia.

Correct Answer: A

Rationale: Dexamethasone, a glucocorticoid, is indicated for clients with brain cancer experiencing headaches as it decreases inflammation and swelling. It is commonly used to reduce cerebral edema and relieve pressure caused by the tumor. Methylphenidate (Choice B) is a central nervous system stimulant used in conditions like ADHD and narcolepsy, not for brain cancer headaches. Hydroxyzine (Choice C) is an antihistamine used for anxiety and allergic conditions, not indicated for brain cancer headaches. Amitriptyline (Choice D) is a tricyclic antidepressant used for depression, neuropathic pain, and migraine prophylaxis, but not typically indicated for brain cancer headaches.

Correct Answer: A

Rationale: The correct answer is A. It is crucial for clients on Digoxin to monitor their heart rate. A heart rate less than 60/min can indicate bradycardia, a potential side effect of Digoxin. Therefore, the client should be instructed to contact the provider if their heart rate is less than 60/min to prevent complications and receive appropriate management. Choices B, C, and D are incorrect. Checking the pulse rate for 30 seconds and multiplying by 2 is not specific to Digoxin administration. Increasing sodium intake is contraindicated as Digoxin can lead to sodium retention. Taking Digoxin with food if nausea occurs is not recommended as it may affect the drug's absorption.

Correct Answer: A

Rationale: Dexamethasone, a glucocorticoid, is indicated for clients with brain cancer to decrease inflammation and swelling. It helps reduce cerebral edema and relieve pressure caused by the tumor, ultimately alleviating headaches. The purpose of prescribing dexamethasone in this case is not to improve concentration (choice B), induce sedation (choice C), or treat depression (choice D). Methylphenidate, a stimulant, is used for conditions like ADHD, not for brain cancer. Hydroxyzine, an antihistamine, is primarily used for anxiety and itching, not for brain cancer. Amitriptyline, a tricyclic antidepressant, is used for conditions like depression and neuropathic pain, not specifically for brain cancer-related headaches.

Correct Answer: A

Rationale: The priority action for a client with Addison's disease undergoing surgery who takes hydrocortisone is to administer a supplemental dose of hydrocortisone. Acute adrenal insufficiency (adrenal crisis) is a significant risk during surgery due to the stress placed on the body. Supplemental doses help prevent acute adrenal insufficiency and ensure the client's safety during the surgical procedure. Instructing the client about coughing and deep breathing is important post-operatively but not the priority before surgery. Collecting additional information about the client's history of Addison's disease is relevant but not the priority action before surgery. Inserting an indwelling urinary catheter is not the priority action in this scenario.