Yes .
The onset of action is rapid (<1 minute), and the effective duration is 5 to 10 minutes. Benzocaine is most commonly available as a 20% aerosol spray that is easily applied to the oropharyngeal mucosa. The limiting factor in benzocaine use is the potential development of clinically significant methemoglobinemia.

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Benzocaine - an overview | ScienceDirect Topics
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