HurriCaine Oral Pain Relief 20% Strength Benzocaine Unit Dose Spray 0.5 mL - 25 Count BoxOral Pain Relief HurriCaine 20% Strength Benzocaine Unit Dose Spray 0. 5 mL Half second of spray is all you need to relieve pain from a cavity until you can get to a dentist; other oral pains Hurricaine relieves include canker sores; sore mouths caused by dentures and braces; and abscessed gums. 20% benzocaine spray has a wild cherry flavor. Oral pain relief comes in a 5 mL unit doses; there are 25 mini spray tubes in a carton.