The present invention provides pasty or liquid compositions for applications on mucous membranes of cavities easily reached by hand, having a bio-adhesive prolonged effect or release. The composition includes a polysaccharide matrix agent selected from the group constituting of lambda carrageenan and iota carrageenan. The matrix allows the in situ formation of a matrix film with a reinforced bio-adhesive capacity due to complexation reactions between the polysaccharide matrix agent and the components of the local secretions of the mucous membranes. The compositions can also include a lecithin compound as a reinforcing agent of the intrinsic bio-adhesive properties of the polysaccharide matrix agent. The composition can further include at least one of (a) a hydration medium for the polysaccharide matrix agent, (b) a lecithin co-solvent allowing the dispersion of the micellar lecithin solution in the hydration medium, (c) an additive or additives, and (d) at least one active ingredient.

Care &amp; Pharma Perspectives SA

CARE &amp; PHARMA PERSPECTIVES SA

Pasty bio-adhesive sustained release compositions

Biocompatible fluorocarbon emulsions having fluorocarbon in concentrations of from 75% weight per volume to 125% weight per volume have small, biocompatible particle size stability through heat sterilization with one emulsifying agent, including phospholipids, in concentrations of from 3% to 7% weight per volume. The single emulsifying agent can be hydrogenated lecithins and synthesized lecithins. Fluorocarbon emulsions having fluorocarbon in concentrations of from 40% weight per volume to 125% weight per volume have stability of partial pressure of oxygen and of partial pressure of carbon dioxide through heat sterilization and storage for extended periods of time after having been oxygenated with dissolved oxygen. A method of preparing biocompatible fluorocarbon emulsions includes preparing a mixture of an emulsifying agent, osmotic agent, buffering agent, aqueous phase and fluorocarbon, forcing the mixture under high pressure into a cavity, against a surface and around a lip to cause turbulence and possibly cavitation to form high fluorocarbon concentration emulsions that are stable through heat sterilization; and, even when oxygenated, maintain substantially stable partial pressures of oxygen and of carbon dioxide, and substantially stable pH. A method of oxygenating high fluorocarbon concentration emuslions includes placing a measured amount of the emulsion in a container and causing the emulsion to form a thin film around the inner surface of the container when the oxygen is injected. An alternative method of oxygenating the high fluorocarbon concentration emulsion includes a two container system where one container, permeable to the to be dissolved gas, is formed within the other, and the emulsion is injected in one container and the to be dissolved gas is injected into the other container.

Alliance Pharmaceutical Corp.

Dissolution of gas in a fluorocarbon liquid

A mixed micellar pharmaceutical formulation includes a micellar proteinic pharmaceutical agent, an lkali metal C8 to C22 alkyl sulphate, alkali metal salicylate, a pharmaceutically acceptable edetate and at least one absorption enhancing compounds. The absorption enhancing compounds are selected from the group consisting of lecithin, hyaluronic acid, pharmaceutically acceptable salts of hyaluronic acid, octylphenoxypolyethoxyethanol, glycolic acid, lactic acid, chamomile extract, cucumber extract, oleic acid, linolenic acid, borage oil, evening of primrose oil, trihydroxy oxo cholanylglycine, glycerin, polyglycerin, lysine, polylysine, triolein and mixtures thereof. The amount of each absorption enhancing compound is present in a concentration of from 1 to 10 wt./wt. % of the total formulation, and the total concentration of absorption enhancing compounds are less than 50 wt./wt. % of the formulation. Preferably, the formulation is administered, in combination with a propellant, to the buccal cavity, using a metered dose dispenser.

lecithin/karies

Pasty bio-adhesive sustained release compositions

Dissolution of gas in a fluorocarbon liquid

Mixed micellar delivery system and method of preparation

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