Can an allergy drug replace lidocaine for stitching cuts?

This study tests whether diphenhydramine (an allergy medicine) works as well as lidocaine for numbing simple cuts that need stitches. About 100 adults in the emergency room will receive one of the two medicines and rate their pain before and after the procedure. The goal is to see if diphenhydramine is a good alternative for people who cannot use lidocaine.