On the day of your surgery, you'll be notified in the days before this what time you're going to want to arrive at the hospital or surgery center. Typically you want to arrive early to make sure that you're available to do all of the preoperative things in the preoperative bay prior to surgery, to make sure everyone is on the same page and ready for your arrival. Once you're in the preoperative area, they'll start you with an IV. You'll be given a number of pain medications prior to surgery that will enhance the pain pathway throughout your recovery process. There are multiple studies that demonstrate a multimodal approach to pain management enhances your functional and pain relief following your hip or knee replacement surgery.