Correct Answer: A

Rationale: Soy products can interfere with levothyroxine absorption by binding to the medication in the gastrointestinal tract, reducing its effectiveness, and should be avoided at the same time as the dose.
Choice B is incorrect because bananas do not affect levothyroxine absorption and are safe to consume.
Choice C is incorrect because lean beef does not significantly impact levothyroxine absorption, though high-protein meals may have a minor effect if taken concurrently.
Choice D is incorrect because carrots do not interfere with levothyroxine absorption.

Correct Answer: A

Rationale: A barrel-shaped chest is a common finding in COPD due to chronic hyperinflation of the lungs, causing the chest to appear rounded and the anteroposterior diameter to increase.
Choice B is incorrect because COPD typically causes tachypnea (rapid breathing) as the body compensates for reduced oxygen exchange, not bradypnea.
Choice C is incorrect because, while clubbing of fingers can occur in advanced COPD with chronic hypoxia, it is less common and not a primary finding.
Choice D is incorrect because weight loss, not weight gain, is typical in COPD due to increased metabolic demand and difficulty eating from dyspnea.

Correct Answer: B

Rationale: Monitoring for signs of toxicity, such as tremor, nausea, or confusion, is critical with lithium, as it has a narrow therapeutic range, and toxicity can occur with dehydration or drug interactions.
Choice A is incorrect because a low-sodium diet can increase lithium levels, leading to toxicity; a consistent, normal-sodium diet is recommended.
Choice C is incorrect because lithium takes 1-2 weeks to stabilize mood, not 24 hours.
Choice D is incorrect because lithium can be taken with or without food; a high-fat meal is not necessary and may delay absorption.

Correct Answer: B

Rationale: Removing contact lenses before instilling latanoprost eye drops prevents the lenses from absorbing the medication or becoming damaged, ensuring proper administration for open-angle glaucoma.
Choice A is incorrect because latanoprost is typically instilled in the evening, as it is most effective at night to reduce intraocular pressure.
Choice C is incorrect because, while iris darkening is a possible side effect, it is not guaranteed or permanent in all clients and is not the priority instruction.
Choice D is incorrect because applying pressure to the inner corner (nasolacrimal duct) of the eye, not the outer corner, prevents systemic absorption, but this is less critical than ensuring proper administration.

Correct Answer: B

Rationale: Reporting signs of infection is critical with methotrexate due to immunosuppression. Antacids are unrelated, pain relief is not immediate, and vitamin C is not specific.