Patent ID: 7862832

Claim:
A tablet comprising: an amount of fentanyl free base or an equivalent amount of salt thereof selected from the group consisting of about 100 micrograms, about 200 micrograms, about 300 micrograms, about 400 micrograms, about 600 micrograms, and about 800 micrograms, calculated as fentanyl free base an effervescent agent which includes a food acid and a bicarbonate in an amount of about 15 to about 60% by weight of said tablet, wherein said acid and said bicarbonate are present in said tablet in stoichiometrically equivalent amounts; a pH adjusting substance which is a carbonate in an amount of about 0.5 to about 25% by weight of said tablet, wherein said pH adjusting substance is in addition to the components of said effervescent agent; a starch glycolate in an amount of about 0.25 to about 20% by weight of said tablet; mannitol in an amount of about 10 to about 80% by weight of said tablet; said tablet being suitable for delivery of said fentanyl across the oral mucosa of a patient by buccal administration and having a dwell time that is less than about 30 minutes.