<unk> (oral topical) is an amino amide and local anesthetic agent that is FDA approved for the treatment of production of topical anesthesia of irritated or inflamed mucous membranes of the mouth and pharynx, reducing gagging during the taking of X-ray pictures and dental impressions. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include edema, erythema, petechiae, pruritus, headache, burning sensation in eye, conjunctival hyperemia and corneal epithelial defect.
Lidocaine 
Etidocaine
Pramocaine
Tocainide
Quinidine
Cinchocaine
Prilocaine
Flecainide