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A patient with congestive heart failure and pulmonary edema is experiencing chest pain.The patient has an order for morphine sulfate IV 4 mg every 5 to 30 minutes PRN until chest pain is relieved.The last dose of 4 mg was 15 minutes prior,and the patient is complaining of chest pain and exhibiting increased work of breathing.The nurse notes a heart rate of 82 beats per minute,a respiratory rate of 18 breaths per minute,and a blood pressure of 135/88 mm Hg.What will the nurse do next?
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