Correct Answer: B

Rationale: Adalimumab is administered subcutaneously. Injection-site redness and swelling are common adverse effects. Therefore, the nurse should monitor the subcutaneous site for redness following the injection to assess for any potential issues or reactions.

Correct Answer: C

Rationale: Atenolol is a beta-blocker that can cause bradycardia as an adverse effect due to its mechanism of action in slowing down the heart rate. The nurse should instruct the client to monitor their pulse regularly and report any significant decreases to prevent complications related to bradycardia.

Correct Answer: A

Rationale: In a client with a plasma lithium level of 2.1 mEq/L, immediate gastric lavage is appropriate for severe toxicity. Gastric lavage can help lower the client's lithium level by removing the unabsorbed lithium from the stomach.

Correct Answer: A

Rationale: The correct instruction for a client prescribed Metronidazole is to avoid drinking alcohol while taking this medication. Consuming alcohol with Metronidazole can lead to a disulfiram-like reaction, causing symptoms such as nausea, vomiting, and flushing. It is crucial to advise clients to abstain from alcohol during the course of treatment to prevent adverse reactions and ensure the effectiveness of the medication.

Correct Answer: C

Rationale: Atenolol, a beta-blocker, can lead to bradycardia as an adverse effect due to its mechanism of action. The nurse should advise the client to monitor their pulse regularly, as a significant decrease may indicate bradycardia, a condition characterized by a slow heart rate.