Correct Answer: B

Rationale: Creatinine levels should be monitored to evaluate vancomycin's effect on kidney function. Vancomycin can be nephrotoxic, so monitoring creatinine levels helps assess renal function and ensure that the medication is not causing harm to the kidneys.

Correct Answer: B

Rationale: Grapefruit juice affects carbamazepine metabolism and should be avoided. It can lead to increased levels of the medication, potentially causing toxicity. Monitoring carbamazepine blood levels and the complete blood count (CBC) is essential to ensure the medication's efficacy and safety. Carbamazepine can cause serious adverse effects like Stevens-Johnson syndrome, which can be life-threatening. Therefore, the client should promptly report any rash to the healthcare provider. Additionally, the client should be educated about potential central nervous system (CNS) side effects such as drowsiness or dizziness, and advised to avoid activities requiring alertness until these effects diminish.

Correct Answer: D

Rationale: Propranolol exerts its pharmacological action by blocking stimulation of both beta1 and beta2 receptors. By doing so, it leads to decreased heart rate and blood pressure. Therefore, both options A and C are correct as propranolol affects both types of beta receptors.

Correct Answer: C

Rationale: Lithium is primarily used to stabilize mood, especially in conditions like bipolar disorder. It helps in reducing the frequency and severity of manic episodes, making it an essential medication for mood stabilization.

Correct Answer: A

Rationale: Amlodipine, a calcium channel blocker, can cause peripheral edema (swelling of the ankles) as a side effect. This occurs due to the dilation of blood vessels and increased fluid retention. It is important for the client to monitor for ankle swelling as it could indicate a potential adverse reaction to the medication. Reporting this side effect to the healthcare provider is crucial to ensure appropriate management and potential adjustment of the treatment plan.