A 28-year-old male with a history of opioid use disorder is admitted to the emergency department by paramedics. He is unresponsive with a respiratory rate of 4 breaths per minute and a heart rate of 50 beats per minute. His pupils are constricted, and his skin is cool and clammy. The nurse prepares to administer naloxone. Which of these is the most immediate expected outcome of administering naloxone to this patient?