Abstract: An object is to provide a hydromorphone hydrochloride- or oxycodone hydrochloride hydrate-containing sustained-release pharmaceutical composition for oral administration that reliably exhibits its main pharmacological effect and has excellent formulation stability that avoids dose dumping of the principal drug, such as alcohol resistance. The present invention provides a sustained-release pharmaceutical composition comprising (A) hydromorphone hydrochloride or oxycodone hydrochloride hydrate, (B) hydroxypropyl methylcellulose acetate succinate having a median size (D50) of 40 ?m or smaller, (C) hydroxypropyl cellulose, and (D) a saccharide, wherein the content ratio of the component (C) to the component (B) by weight in the composition, (C)/(B), is 11/3 to 3/11.

Abstract: It is intended to avoid dose dumping of a drug and improve the dissolution properties of the drug in the lower gastrointestinal tract, and thereby provide a sustained-release matrix preparation for oral administration that reliably exhibits its main pharmacological effect when orally administered once or twice a day. The present invention provides a sustained-release matrix preparation comprising (A) a pharmacologically active drug, (B) a combination of cellulose derivatives, and (C) mannitol.

Abstract: It is intended to avoid dose dumping of a drug and improve the dissolution properties of the drug in the lower gastrointestinal tract, and thereby provide a sustained-release matrix preparation for oral administration that reliably exhibits its main pharmacological effect when orally administered once or twice a day. The present invention provides a sustained-release matrix preparation comprising (A) a pharmacologically active drug, (B) a combination of cellulose derivatives, and (C) mannitol.

Abstract: An object is to provide a hydromorphone hydrochloride- or oxycodone hydrochloride hydrate-containing sustained-release pharmaceutical composition for oral administration that reliably exhibits its main pharmacological effect and has excellent formulation stability that avoids dose dumping of the principal drug, such as alcohol resistance. The present invention provides a sustained-release pharmaceutical composition comprising (A) hydromorphone hydrochloride or oxycodone hydrochloride hydrate, (B) hydroxypropyl methylcellulose acetate succinate having a median size (D50) of 40 ?m or smaller, (C) hydroxypropyl cellulose, and (D) a saccharide, wherein the content ratio of the component (C) to the component (B) by weight in the composition, (C)/(B), is 11/3 to 3/11.

Abstract: It is intended to avoid dose dumping of a drug and improve the dissolution properties of the drug in the lower gastrointestinal tract, and thereby provide a sustained-release matrix preparation for oral administration that reliably exhibits its main pharmacological effect when orally administered once or twice a day. The present invention provides a sustained-release preparation obtained by mixing of (A) a pharmacologically active drug, (B) hydroxypropyl methylcellulose acetate succinate having a median size (D50) of 40 ?m or smaller, (C) a cellulose derivative, and (D) a saccharide or a nonionic water-soluble polymer followed by molding.