ATI Pharmacology Test Bank

Correct Answer: B

Rationale: When administering eye drops, it is essential to ask the client to look up at the ceiling. This position helps prevent the drops from falling onto the cornea, ensuring that the medication is properly absorbed without causing discomfort or irritation.

Correct Answer: A

Rationale: Mesna, an uroprotectant agent, is administered with nitrogen mustard chemotherapy drugs like Cyclophosphamide to prevent hemorrhagic cystitis, a common adverse effect. Mesna works by binding to and inactivating the toxic metabolites of Cyclophosphamide in the bladder, thereby reducing the risk of bladder toxicity.

Correct Answer: B

Rationale: The correct answer is B. Grapefruit can increase the levels of simvastatin in the blood, leading to an increased risk of serious side effects, including muscle pain or damage. Therefore, it is crucial for the client to avoid consuming grapefruit while taking this medication to prevent potential complications.

Correct Answer: B

Rationale: The nurse should obtain the blood sample for the peak serum level at 1030. This timing allows for 30 minutes to elapse after the completion of the 1-hour IV infusion, which is the recommended window for obtaining the peak serum level of gentamicin.

Correct Answer: C

Rationale: Phenytoin is primarily used to diminish seizure activity and is effective in terminating ventricular arrhythmias. It works by stabilizing neuronal membranes, reducing repetitive neuronal firing, and limiting the spread of seizure activity in the brain. While phenytoin does not have a direct role in preventing thrombus formation or extending existing thrombi, it is crucial in managing seizures and certain arrhythmias.