buccal aerosol sprays or capsules using polar and non - polar solvent have now been developed which provide biologically active compounds for rapid absorption through the oral mucosa , resulting in fast onset of effect . the buccal polar compositions of the invention comprise formulation i : aqueous polar solvent , active compound , and optional flavoring agent ; formulation ii : aqueous polar solvent , active compound , optionally flavoring agent , and propellant ; formulation iii : non - polar solvent , active compound , and optional flavoring agent ; and formulation iv : non - polar solvent , active compound , optional flavoring agent , and propellant .