A nurse receives a postoperative order to give 1 mg hydromorphone IV every 4 hours PRN for severe pain. The pharmacy delivered prefilled syringes labeled hydromorphone 4 mg/mL. Which is the priority nursing action before administration?

Hydromorphone (Dilaudid) is approximately 7 times more potent than morphine when given IV (1 mg IV hydromorphone is roughly equivalent to 7 mg IV morphine). It is on every high-alert medication list because dose-confusion errors with morphine are common and frequently fatal. Standard ISMP and Joint Commission safe practices: (1) verify the order, the indication, the patient, and check for opioid tolerance; (2) recognize that a 4 mg/mL syringe contains four full doses for a 1 mg order — never give the entire prefilled syringe; (3) draw the prescribed 0.25 mL (1 mg) into a separate syringe and waste the remainder with a licensed witness, document the waste; (4) two-nurse independent double check before administration is recommended for high-alert IV opioids in many institutions; (5) administer slowly over 2 to 3 minutes IV; (6) reassess pain, sedation level (POSS), respiratory rate, and SpO2 before, during, and after; (7) renarcotization is unlikely with a single 1 mg dose, but cumulative dosing requires monitoring. Discarding the syringe and calling pharmacy delays needed analgesia. Substituting morphine without an order is unsafe. Giving the full 4 mg is a fatal error.

High-alert recognition + waste with witness + double check is the safe path. Hydromorphone is not morphine — never assume equivalence and never give a prefilled syringe at face value.