A buccal delivery system is disclosed suitable for delivery of a therapeutic agent to the oral cavity of a patient. The delivery system comprises a matrix for containing and releasing the therapeutic agent into the oral cavity and an alkyl N,N-disubstituted amino acetate in said matrix. A particularly preferred delivery system comprises a matrix containing an effective amount of therapeutic agent together with an alkyl N,N-disubstituted amino acetate, such as dodecyl 2-(N,N-dimethylamino) propionate salt.