The purpose of this clinical trial is to determine if receiving magnesium sulfate as an adjunctive analgesic for prostate surgery is effective in reducing pain. Subjects will be randomized to receive magnesium or not receive it, as part of a standardized general anesthetic for prostate surgery. The primary objective is to demonstrate improved pain scores in patients receiving magnesium sulfate as an adjunctive analgesic during surgery. Secondary objectives include demonstrating reduced requirements for other opioids, reduced postoperative shivering, improved discharge home and adequate neuromuscular blockade reversal, measured by quantitative train of four monitoring.

Inclusion Criteria:

1. Age 18 and older.
2. Undergoing a robotic prostatectomy under general anesthesia.
3. Is willing and able to provide consent to participate in the study.

Exclusion Criteria:

1. Patients younger than 18 years
2. Patients with end-stage renal disease
3. Known allergy to magnesium sulfate preparations
4. Any patient that the investigators feel cannot comply with all study related procedures

The de-identified participant data from the final research dataset used in the published manuscript will be shared upon reasonable request beginning 9 months and ending 36 months following article publication or as required by a condition of awards and agreements supporting the research, provided the investigators whose proposed use of the data has been approved by an independent review committee ("learned intermediary") identified for this purpose. Proposals may be submitted up to 36 months following article publication. After 36 months the data will be available in our University's data warehouse but without investigator support other than deposited metadata. Information regarding submitting requests and accessing data may be found at (Link to be provided). The protocol, Statistical Analysis Plan, and Informed Consent Form will be made available on Clinicaltrials.gov only as required by federal regulation or as a condition of awards and agreements supporting the research

Beginning 9 months and ending 36 months following article publication or as required by a condition of awards and agreements supporting the research.

Investigators whose proposed use of the data has been approved by an independent review committee ("learned intermediary") identified for this purpose. Proposals may be submitted up to 36 months following article publication. After 36 months the data will be available in our University's data warehouse but without investigator support other than deposited metadata. Information regarding submitting requests and accessing data may be found at (Link to be provided).