Can a common nausea drug ease hip surgery pain?

This study tests whether giving dexamethasone through a vein can improve pain control after total hip replacement. About 198 adults having hip surgery will receive either no dexamethasone, 4 mg, or 8 mg, along with standard anesthesia and a nerve block. The main goal is to see how long patients go without needing extra pain medication. The study also tracks pain levels, opioid use, nausea, and side effects.