Correct Answer: B

Rationale: The correct answer is B. The nurse should instruct the client to avoid excessive intake of caffeinated beverages as they can interfere with lithium levels. Option A is incorrect as lithium is usually recommended to be taken on an empty stomach. Option C is not directly related to lithium therapy. Option D is not a typical instruction for lithium therapy.

Correct Answer: B

Rationale: Visual disturbances such as blurred vision or seeing halos around lights are common signs of digoxin toxicity. Increased appetite, weight gain, and constipation are not typically associated with digoxin toxicity. Weight gain could be a sign of worsening heart failure rather than digoxin toxicity. Increased appetite and constipation are not specific signs of digoxin toxicity and are less likely to be related.

Correct Answer: A

Rationale: The correct answer is A: Decreased nausea. Ondansetron is classified as an antiemetic medication, which means it is used to relieve nausea and vomiting by blocking serotonin in the chemoreceptor trigger zone. Therefore, the nurse administering ondansetron should expect a therapeutic effect of decreased nausea. Choice B, increased appetite, is incorrect as ondansetron does not affect appetite. Choice C, increased heart rate, is incorrect as ondansetron does not have a direct effect on heart rate. Choice D, relief of headache, is also incorrect as the primary therapeutic effect of ondansetron is to alleviate nausea and vomiting, not headaches.

Correct Answer: B

Rationale: The correct answer is B: Serum creatinine. Acetaminophen is metabolized by the liver, so serum creatinine levels should be monitored for potential hepatotoxicity. Monitoring serum creatinine can help detect liver damage, a potential adverse effect of acetaminophen. Choices A, C, and D are incorrect because serum glucose is not directly affected by acetaminophen, serum potassium is not typically monitored for acetaminophen adverse effects, and serum bilirubin is more related to bile metabolism rather than acetaminophen-induced hepatotoxicity.

Correct Answer: B

Rationale: The correct answer is B. Albuterol is a rescue inhaler that should be used during asthma attacks to provide quick relief by opening the airways. Using it daily as a preventive measure is not recommended. Choice A is incorrect because a dry cough is not a common side effect of albuterol. Choice C is incorrect as albuterol does not need to be taken with food. Choice D is incorrect because albuterol is not meant to be used daily for asthma prevention.