320 adult postoperative in-patients, who met all study entry requirements, and were expected to require opioid analgesia for at least 24 hours, and up to 72 hours, after surgery were enrolled. Patients used the Zalviso™ (sufentanil sublingual tablet system) 15 mcg to self-administer a tablet of study drug as needed for pain. The System was evaluated for usability and functionality for up to 72 hours.
