#$%^&*AU2019206022A120190801.pdf#####ABSTRACT The present invention provides abuse deterrent mucoadhesive devices for delivery of buprenorphine. Each device comprises a mucoadhesive layer and a backing layer, and the pH in each layer is selected, such that absorption of buprenorphine is maximized.1/4 BARRIER MUCOAbiESIVE BARRIER , <;.,xiMUCOAIJESIVE UCOSA BARRIER - T.M0COADHE5VEMUCOSA Exemplary Embodiments of the Invention FIG. 1