A separate, standardized datasheet (Appendix B) will be used to collect the time when the study drug was first administered, the time when the procedure began, the time the procedure was completed and the time to recovery. Upon completion of the procedure, a recovery score based on a modified Aldrete Scale, will be recorded by a research associate blinded as to the intervention used every 2 minutes until full recovery, defined as a minimum cumulative score of 8. The attending physician will be asked to document any complications (including hypotension, apnea, hypoxia, laryngospasm and pain on injection) that occurred during the procedure and if any interventions were necessary. The nurse caring for the patient will also record any adverse events (nausea, vomiting, agitation) that occurred during recovery.