Correct Answer: C

Rationale: The correct instruction for a client prescribed lithium is to drink at least 2 liters of water each day. This is important to prevent dehydration and reduce the risk of lithium toxicity. Option A is incorrect because lithium is usually taken with food to minimize gastrointestinal side effects. Option B is unrelated to lithium and is more applicable to clients taking MAOIs. Option D is incorrect as lithium is typically taken in divided doses throughout the day to maintain therapeutic levels.

Correct Answer: C

Rationale: The correct answer is C. A respiratory rate of 10/min indicates respiratory depression, a serious adverse effect of morphine that should be reported immediately. Options A, B, and D are within normal limits and are not indicative of a potentially life-threatening complication associated with morphine therapy.

Correct Answer: C

Rationale: The correct instruction for a client prescribed lithium is to drink at least 2 liters of water each day. This is important to prevent dehydration and reduce the risk of lithium toxicity. Option A is incorrect because lithium is usually taken with food to minimize gastrointestinal side effects. Option B is unrelated to lithium and is more applicable to clients taking MAOIs. Option D is incorrect as lithium is typically taken in divided doses throughout the day to maintain therapeutic levels.

Correct Answer: B

Rationale: The correct action the nurse should take when administering enoxaparin is to inject the medication deep into subcutaneous tissue. This method helps ensure proper absorption of the medication and prevents tissue irritation. Injecting into the deltoid muscle (Choice A) is not recommended for enoxaparin administration. Massaging the injection site (Choice C) can lead to tissue damage and bruising. Inserting the needle at a 10-degree angle (Choice D) is not the correct technique for administering enoxaparin.

Correct Answer: D

Rationale: A gastric residual of 150 mL may indicate delayed gastric emptying and should be reported to the provider.