Peptide Pharmaceutical for Oral Delivery

摘要

Acid-containing oral pharmaceutical compositions are provided wherein the pharmaceutical active agents are peptide compounds (i.e., those that include a plurality of amino acids and at least one peptide bond in their molecular structures). Certain barrier layers and/or particulate coated acid are used to reduce any adverse interactions that might otherwise occur between the acid of the compositions and other components of the composition. Use of these barrier layers and/or use of particulate coated acid is believed to promote a more simultaneous release of the components of the composition than is achieved by prior art acid-protection techniques, thus enhancing, and making more consistent, the bioavailability of the active peptide compounds.

主权项

1. A pharmaceutical composition for oral delivery of a physiologically active peptide agent comprising:
(A) said peptide agent; (B) at least one pharmaceutically acceptable acid wherein acid is present in said pharmaceutical composition in a quantity which, if said composition were added to 10 milliliters of 0.1M aqueous sodium bicarbonate solution, would be sufficient to lower the pH of said solution to no higher than 5.5; (C) an acid resistant protective vehicle effective to transport said pharmaceutical composition through the stomach of a patient while preventing contact between said active peptide agent and stomach proteases; and (D) a water soluble barrier layer that separates said acid from said protective vehicle;wherein either (a) said barrier layer adds 3-6% to the weight of the pharmaceutical composition, exclusive of any acid-protective vehicle, or (b) said barrier layer comprises a material having water solubility in excess of 11 grams per 100 milliliters of water at room temperature, or (c) said peptide agent and said acid are in the same or only layer of said composition.