The nurse administers naloxone to a young adult client who overdosed on hydromorphone. Which assessment data indicates that the naloxone is effective?

Babinski reflex changes from negative to positive.

Pupil size increases from 4 mm to 6 mm.

Blood pressure decreases from 140/94 mm Hg to 120/78 mm Hg.

Respirations increase from 8 breaths/minute to 12 breaths/minute.