After administering nitroglycerin spray to a client experiencing angina, which action should the nurse implement next?

A. Statins, such as atorvastatin: Statins primarily lower cholesterol and have no significant interaction with sildenafil that would cause an urgent safety concern. Although monitoring for muscle-related side effects is important with statins, it is not the priority here.

B. Analgesics, such as acetaminophen: Acetaminophen is generally safe and does not interact dangerously with sildenafil. There is no immediate concern related to combining these two medications.

C. Anticoagulants, such as warfarin: There is a potential for increased bleeding risk when sildenafil is combined with anticoagulants, but this is generally not an acute, life-threatening interaction requiring immediate determination before other more critical concerns.

D. Nitrates, such as nitroglycerin: Taking sildenafil with nitrates can cause profound, life-threatening hypotension. Both sildenafil and nitrates can cause vasodilation, and their combined use can lead to a dangerous and potentially fatal drop in blood pressure. This combination is absolutely contraindicated, and the nurse must immediately assess whether the client uses any nitrate medication to prevent a serious adverse event.

0845: The peak action of insulin lispro occurs about 1 to 2 hours after injection. Since it was administered at 0745, the nurse should expect a peak effect beginning around 0845, when the insulin will have its strongest blood glucose-lowering action.

0745: 0745 is the time when the insulin lispro was administered, not when it starts working. Since lispro usually takes about 15 to 30 minutes to begin acting, 0745 is too early to expect therapeutic action.

0815: Lispro insulin begins to work approximately 15 to 30 minutes after subcutaneous administration. Since it was given at 0745, the nurse should expect it to start lowering blood glucose around 0815, consistent with its pharmacologic profile.

0915: Given that insulin lispro peaks 1 to 2 hours after administration, the later part of the peak window would occur around 0915. This timing ensures the nurse monitors for potential hypoglycemia at the height of insulin activity.