- Has a known allergy to any ester based anesthetics including cocaine, procaine, tetracaine, chlorprocaine, dibucaine, or benzocaine and/or any other compounds of the drugs and/or devices that are part of this protocol. (Amide based or other non-ester based anesthetic allergies are NOT exclusionary. Amide based anesthetics are: Lidocaine, Mepivicaine, Bupivicaine, Levobupivicaine, Ropivicaine, Etidocaine, Prolicaine, and Articaine).