Benzonatate, a nonnarcotic oral antitussive agent, is 2,5,8,11,14,17,20, 23,26- nonaoxaoctacosan-28-yl-p-(butylamino) benzoate; with an average molecular weight of 603.7. The chemical formula is C₃₀H₅₃NO₁₁, structural formula is:

Each softgel (soft gelatin capsule), for oral administration, contains 100 mg benzonatate. In addition, each capsule contains the following inactive ingredients: D&C Yellow No. 10, gelatin, glycerin, methylparaben, propylparaben and purified water.

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