When having a dental procedure, could you get too much novocaine and overdose?

Unlikely!: This is extremely unlikely. The dose of novocaine or other numbing medication (local anesthetic) used in dental work is very low. When patients notice side effects during dental work, they are usually related to the Epinephrine that is combined with the local anesthesia to constrict blood vessels and control bleeding. This can sometimes briefly cause a rapid heart rate and a feeling of anxiety.

Unlikely: Local anesthesia is delivered in measured doses. A dentist knows that different patients can tolerate different amounts of local anesthetic. It is unlikely that a dentist would administer enough anesthesic solution to overdose a patient during a routine procedure.