This two arm, patient blinded, randomized, post market clinical trial in a single orthopedic hospital will determine whether there is improved pain management and decreased length of stay (LOS) when comparing standard of care pain management with and without sufentanil. The objective is to compare LOS between patients who have had primary THA or TKA and have received standard of care peri-operative pain management and one dose of sufentanil 30 mcg sublingual pre-operatively in the operating room and one dose post-operatively in the post anesthesia care unit (PACU) versus those who have received only standard of care peri-operative pain management in a orthopedic specialty hospital.
