Experimental Pain Study to Assess Local Anesthetic Efficacy and Safety of CTY-5339 Anesthetic Spray in Normal Volunteers

Metered spray bottle with ≈200 uL total spray volume. Contains the active ingredients: 14.0% Benzocaine (USP = 28 mg) and 2.0% Tetracaine Hydrochloride (USP = 4 mg). Administered in a single anesthetic spray.

Metered spray bottle with ≈200 uL total spray volume. Contains the active ingredient: 14.0% Benzocaine (USP = 28 mg). Administered in a single anesthetic spray.

Metered spray bottle with ≈400 uL total spray volume. Contains the active ingredients: 14.0% Benzocaine (USP = 56 mg total) and 2.0% Tetracaine Hydrochloride (USP = 8 mg total). Administered in two anesthetic sprays.

A single spray of CTY-5339-CB in a metered spray bottle with ≈200 uL total spray volume, containing the active ingredient: 14.0% Benzocaine (USP = 28 mg). This was administered in combination with a single spray of CTY-5339-P (acting as vehicle control placebo with no active ingredient) in a metered spray bottle with ≈200 uL total spray volume. This combination was used to maintain double-blind conditions. The vehicle control was sprayed outside the circumscribed area to avoid dilution of active drug.