A nurse is caring for a client who has a prescription for nifedipine. Which of the following findings should the nurse assess prior to administration of the medication?

A. Check the client's pulse oximetry level every 6 hr: Pulse oximetry provides valuable information on oxygen saturation, but checking only every 6 hours may not detect early respiratory depression caused by opioid PCA therapy.

B. Check the client's blood pressure every 4 hr: Blood pressure monitoring is important postoperatively, but opioid-induced respiratory depression is a more immediate risk in the first 24 hours of PCA use, so respirations take priority.

C. Check the client's respirations every 2 hr: Opioids administered via PCA can cause respiratory depression, especially in the first 24 hours. Monitoring respiratory rate frequently allows for early detection and intervention if hypoventilation occurs.

D. Assess the client's apical heart rate every 8 hr: While cardiac monitoring may be indicated for some clients, the apical heart rate is not the most critical assessment for PCA therapy. Respiratory function is the priority for detecting opioid-related complications.

A. "Drink the elixir using a straw to prevent staining your teeth.": Using a straw helps prevent the liquid iron from coming into direct contact with the teeth, reducing the risk of permanent staining, which is a common side effect of ferrous sulfate elixir.

B. "Take the medication with an antacid if it upsets your stomach.": Antacids decrease the absorption of iron. To optimize effectiveness, ferrous sulfate should be taken on an empty stomach or with vitamin C–rich foods, rather than with antacids.

C. "Increase your fiber intake to prevent constipation.": Iron supplements commonly cause constipation. Increasing dietary fiber, fluids, and physical activity can help manage this adverse effect and maintain regular bowel function.

D. "Stop taking the medication if your stools become green or black.": Dark stools are a common, harmless side effect of iron supplementation. Clients should be reassured rather than stopping the medication.

E. "Increase your intake of dairy products to increase the absorption of this medication.": Dairy products contain calcium, which inhibits iron absorption. Iron should be taken separately from calcium-rich foods or supplements to maximize absorption.