Benzocaine is a white odorless and tasteless ester of para-aminobenzoate. This is a very popular and highly effective topical numbing agent used across many industries including medical and dental.  Benzocaine is used in many anal lubricants, male prolonging products, and other topical solutions as a numbing agent or anesthetic.  It is generally safe to ingest Benzocaine in small doses.  Some deep throat numbing sprays use Benzocaine to numb the throat thus avoiding any gag reflexes.