escent oral fentanyl dosage form and methods of administeringUS2006029221928 Aug 200628 Dec 2006Cima Labs Inc.Making a tablet by combining a drug such as fentanyl with an effervescent agent used as penetration enhancer to influence the permeability of the medicament in the oral cavity; compressing to form tabletUS2007003685315 Sep 200615 Feb 2007Cima Labs Inc.Generally linear effervescent oral fen