Ethyl 4-aminobenzoate, also known as benzocaine, is an ester of para-aminobenzoic acid (PABA) and ethanol. It is a local anesthetic widely used for topical pain relief and as an active ingredient in over-the-counter (OTC) products such as lozenges, ointments, and dental gels. Its ability to block nerve signal transmission by inhibiting sodium channels makes it effective in numbing tissues and...