Benzocaine is an over-the-counter medication that is designed to numb parts of the mouth, according to Drugs.com. Orajel is one brand name of the medicine.
Benzocaine is used to treat pain associated with cold sores, fever blisters and pain from teething. Abreva is another over-the-counter medication used to numb the mouth, as stated by WebMD. The numbing medications are designed to treat specific areas of the mouth rather than the entire area. They can be applied several times per day but should not be used long term. They should also not be used on children unless recommended by a doctor. For severe mouth problems, a person should contact a health care professional.