Reaction

I had cavities filled with a local before and a root canal about 6 years ago no problems.  I need another cavity filled and afraid of having a bad reaction to the local which I never ever had before.  What are the chances of having no problems like I did before?

[Jerome Tsang, DDS]

Probably very high you'll have the same type of appointment.  People sometimes get an allergic reaction to the preservatives but not usually to the anesthetic.  It depends on what the anesthetic is, whether its an ether or amide based anesthetic.  I would guess that it's an amide since lidocaine is the most commonly used anesthetic.