Split Face Study of the Duration of Local Anesthetics - Fifth Arm

This study will compare how long local anesthesia lasts when it is injected into different layers of the skin on the forearm. The investigators hypothesize that the numbing effect will last for different amounts of time depending on whether the medication is injected just under the skin or into the skin itself.

NCT Number	NCT07724418
Lead Sponsor	Weill Medical College of Cornell University
Conditions	This Study Will Focus on In-office Dermatological Procedures
Enrollment	50 participants
Start Date	2026-08-01
Primary Completion	2027-06-30 (estimated)
Study Completion	2027-06-30 (estimated)
Updated on ClinicalTrials.gov	2026-07-24