Correct Answer: B

Rationale: Bruising is an adverse effect to be monitored when a client is prescribed Aspirin for myocardial infarction prevention due to its association with increased bleeding risk. Aspirin's antiplatelet effect can lead to bruising and other signs of bleeding, necessitating close observation to prevent complications.

Correct Answer: B

Rationale: The correct instruction for a client starting simvastatin is to report any muscle pain immediately because it could be indicative of rhabdomyolysis, a serious side effect of the medication. This prompt reporting can help prevent further complications and ensure timely medical intervention.

Correct Answer: A

Rationale: Labetalol should be taken with food to increase absorption and reduce the risk of orthostatic hypotension. Taking it with food helps in better absorption and minimizes the potential drop in blood pressure when standing up, which can occur with this medication.

Correct Answer: B

Rationale: The correct answer is to monitor Prothrombin time (PT) when a patient is on warfarin therapy. Warfarin affects blood clotting, and PT is used to assess the therapeutic effect of this medication.

Correct Answer: B

Rationale: Pyridoxine is administered with Isoniazid to prevent peripheral neuropathy, a common adverse effect of the drug. It is essential to provide this supplement to the client to minimize the risk of developing this adverse effect.