Not allergic to lidocaine whats chances of been allergic to novacaine or other caine local anathetics used for dentistry?

Allergy: Firstly allergies to local anesthetics is rare. If you do not have a known and documented allergy then you should be quite fine.

You are good: There were allergies to Novacaine, but that drug is probably not available anymore. Allergies to local anesthetics that dentist use are almost unknown. There are some allergies to local anesthetics in multi-dose vials, but dentists don't use those.

Maybe but Never Seen: All "caines" are not the same. There are multiple "families" of different anesthetics. The newer ones are really very good. The actual Novacaine has not generally been used in Dentistry for the past 40+ years.

Very slim: Novacaine isn't used in dentistry anymore. Lidocaine is a "work-horse" local anesthesia used by nearly every dentist that practices. Your chances of being allergic to a local anesthesia are very, very slim. I'd say the most common caution is people who are allergic to sulfa, which is in Articaine...and people who cannot have epinephrine. If you're clear of those two things then you're good.

Very, Very Low: Allergic reactions to local anesthetics are extremely rare. That's really nothing to worry about.