EP1988886A1 — Delayed release pharmaceutical oral dosage form and method of making same

USPTO Abstract

The present invention relates to a multi layer pharmaceutical oral dosage form having delayed release and immediate release properties and method of making same. The delayed release formulation substantially behaves as an enterically coated dosage form but without the formulation and the application of an enteric coating. The delayed release formulation is characterized by a mixture of one or more active ingredients and one or more excipients selected from the group of solid aliphatic alcohols, mixtures of esters of saturated fatty alcohols and saturated fatty acids, natural or synthetic waxes, hydrogenated castor oil, hydrogenated vegetable oil, gums, and mixtures thereof; pH dependent soluble polymers; and optionally an opacifying agent.